quadp (p42, positive)

Percentage Accurate: 52.9% → 85.4%
Time: 12.1s
Alternatives: 7
Speedup: 11.6×

Specification

?
\[\begin{array}{l} \\ \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \end{array} \]
(FPCore (a b c)
 :precision binary64
 (/ (+ (- b) (sqrt (- (* b b) (* 4.0 (* a c))))) (* 2.0 a)))
double code(double a, double b, double c) {
	return (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
}
real(8) function code(a, b, c)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: c
    code = (-b + sqrt(((b * b) - (4.0d0 * (a * c))))) / (2.0d0 * a)
end function
public static double code(double a, double b, double c) {
	return (-b + Math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
}
def code(a, b, c):
	return (-b + math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a)
function code(a, b, c)
	return Float64(Float64(Float64(-b) + sqrt(Float64(Float64(b * b) - Float64(4.0 * Float64(a * c))))) / Float64(2.0 * a))
end
function tmp = code(a, b, c)
	tmp = (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
end
code[a_, b_, c_] := N[(N[((-b) + N[Sqrt[N[(N[(b * b), $MachinePrecision] - N[(4.0 * N[(a * c), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / N[(2.0 * a), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}
\end{array}

Sampling outcomes in binary64 precision:

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 7 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Initial Program: 52.9% accurate, 1.0× speedup?

\[\begin{array}{l} \\ \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \end{array} \]
(FPCore (a b c)
 :precision binary64
 (/ (+ (- b) (sqrt (- (* b b) (* 4.0 (* a c))))) (* 2.0 a)))
double code(double a, double b, double c) {
	return (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
}
real(8) function code(a, b, c)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: c
    code = (-b + sqrt(((b * b) - (4.0d0 * (a * c))))) / (2.0d0 * a)
end function
public static double code(double a, double b, double c) {
	return (-b + Math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
}
def code(a, b, c):
	return (-b + math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a)
function code(a, b, c)
	return Float64(Float64(Float64(-b) + sqrt(Float64(Float64(b * b) - Float64(4.0 * Float64(a * c))))) / Float64(2.0 * a))
end
function tmp = code(a, b, c)
	tmp = (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
end
code[a_, b_, c_] := N[(N[((-b) + N[Sqrt[N[(N[(b * b), $MachinePrecision] - N[(4.0 * N[(a * c), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / N[(2.0 * a), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}
\end{array}

Alternative 1: 85.4% accurate, 0.5× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;b \leq -5 \cdot 10^{+153}:\\ \;\;\;\;-1 \cdot \frac{b}{a}\\ \mathbf{elif}\;b \leq 5 \cdot 10^{-112}:\\ \;\;\;\;\frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(-4 \cdot a\right)\right)} - b}{a \cdot 2}\\ \mathbf{else}:\\ \;\;\;\;-1 \cdot \frac{c}{b}\\ \end{array} \end{array} \]
(FPCore (a b c)
 :precision binary64
 (if (<= b -5e+153)
   (* -1.0 (/ b a))
   (if (<= b 5e-112)
     (/ (- (sqrt (fma b b (* c (* -4.0 a)))) b) (* a 2.0))
     (* -1.0 (/ c b)))))
double code(double a, double b, double c) {
	double tmp;
	if (b <= -5e+153) {
		tmp = -1.0 * (b / a);
	} else if (b <= 5e-112) {
		tmp = (sqrt(fma(b, b, (c * (-4.0 * a)))) - b) / (a * 2.0);
	} else {
		tmp = -1.0 * (c / b);
	}
	return tmp;
}
function code(a, b, c)
	tmp = 0.0
	if (b <= -5e+153)
		tmp = Float64(-1.0 * Float64(b / a));
	elseif (b <= 5e-112)
		tmp = Float64(Float64(sqrt(fma(b, b, Float64(c * Float64(-4.0 * a)))) - b) / Float64(a * 2.0));
	else
		tmp = Float64(-1.0 * Float64(c / b));
	end
	return tmp
end
code[a_, b_, c_] := If[LessEqual[b, -5e+153], N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision], If[LessEqual[b, 5e-112], N[(N[(N[Sqrt[N[(b * b + N[(c * N[(-4.0 * a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] - b), $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision], N[(-1.0 * N[(c / b), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;b \leq -5 \cdot 10^{+153}:\\
\;\;\;\;-1 \cdot \frac{b}{a}\\

\mathbf{elif}\;b \leq 5 \cdot 10^{-112}:\\
\;\;\;\;\frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(-4 \cdot a\right)\right)} - b}{a \cdot 2}\\

\mathbf{else}:\\
\;\;\;\;-1 \cdot \frac{c}{b}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if b < -5.00000000000000018e153

    1. Initial program 45.8%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative45.8%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified45.8%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around -inf 98.9%

      \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]

    if -5.00000000000000018e153 < b < 5.00000000000000044e-112

    1. Initial program 82.9%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative82.9%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      2. +-commutative82.9%

        \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} + \left(-b\right)}}{a \cdot 2} \]
      3. unsub-neg82.9%

        \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} - b}}{a \cdot 2} \]
      4. fma-neg82.9%

        \[\leadsto \frac{\sqrt{\color{blue}{\mathsf{fma}\left(b, b, -4 \cdot \left(a \cdot c\right)\right)}} - b}{a \cdot 2} \]
      5. *-commutative82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -4 \cdot \color{blue}{\left(c \cdot a\right)}\right)} - b}{a \cdot 2} \]
      6. associate-*r*82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -\color{blue}{\left(4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
      7. distribute-lft-neg-in82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(-4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
      8. *-commutative82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \left(-\color{blue}{c \cdot 4}\right) \cdot a\right)} - b}{a \cdot 2} \]
      9. distribute-rgt-neg-in82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(c \cdot \left(-4\right)\right)} \cdot a\right)} - b}{a \cdot 2} \]
      10. associate-*r*82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{c \cdot \left(\left(-4\right) \cdot a\right)}\right)} - b}{a \cdot 2} \]
      11. metadata-eval82.9%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(\color{blue}{-4} \cdot a\right)\right)} - b}{a \cdot 2} \]
    3. Simplified82.9%

      \[\leadsto \color{blue}{\frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(-4 \cdot a\right)\right)} - b}{a \cdot 2}} \]
    4. Add Preprocessing

    if 5.00000000000000044e-112 < b

    1. Initial program 17.9%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative17.9%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified17.9%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around inf 86.7%

      \[\leadsto \color{blue}{-1 \cdot \frac{c}{b}} \]
  3. Recombined 3 regimes into one program.
  4. Add Preprocessing

Alternative 2: 85.2% accurate, 0.9× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;b \leq -5 \cdot 10^{+153}:\\ \;\;\;\;-1 \cdot \frac{b}{a}\\ \mathbf{elif}\;b \leq 2.6 \cdot 10^{-117}:\\ \;\;\;\;\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}\\ \mathbf{else}:\\ \;\;\;\;-1 \cdot \frac{c}{b}\\ \end{array} \end{array} \]
(FPCore (a b c)
 :precision binary64
 (if (<= b -5e+153)
   (* -1.0 (/ b a))
   (if (<= b 2.6e-117)
     (/ (+ (- b) (sqrt (- (* b b) (* 4.0 (* a c))))) (* 2.0 a))
     (* -1.0 (/ c b)))))
double code(double a, double b, double c) {
	double tmp;
	if (b <= -5e+153) {
		tmp = -1.0 * (b / a);
	} else if (b <= 2.6e-117) {
		tmp = (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
	} else {
		tmp = -1.0 * (c / b);
	}
	return tmp;
}
real(8) function code(a, b, c)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: c
    real(8) :: tmp
    if (b <= (-5d+153)) then
        tmp = (-1.0d0) * (b / a)
    else if (b <= 2.6d-117) then
        tmp = (-b + sqrt(((b * b) - (4.0d0 * (a * c))))) / (2.0d0 * a)
    else
        tmp = (-1.0d0) * (c / b)
    end if
    code = tmp
end function
public static double code(double a, double b, double c) {
	double tmp;
	if (b <= -5e+153) {
		tmp = -1.0 * (b / a);
	} else if (b <= 2.6e-117) {
		tmp = (-b + Math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
	} else {
		tmp = -1.0 * (c / b);
	}
	return tmp;
}
def code(a, b, c):
	tmp = 0
	if b <= -5e+153:
		tmp = -1.0 * (b / a)
	elif b <= 2.6e-117:
		tmp = (-b + math.sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a)
	else:
		tmp = -1.0 * (c / b)
	return tmp
function code(a, b, c)
	tmp = 0.0
	if (b <= -5e+153)
		tmp = Float64(-1.0 * Float64(b / a));
	elseif (b <= 2.6e-117)
		tmp = Float64(Float64(Float64(-b) + sqrt(Float64(Float64(b * b) - Float64(4.0 * Float64(a * c))))) / Float64(2.0 * a));
	else
		tmp = Float64(-1.0 * Float64(c / b));
	end
	return tmp
end
function tmp_2 = code(a, b, c)
	tmp = 0.0;
	if (b <= -5e+153)
		tmp = -1.0 * (b / a);
	elseif (b <= 2.6e-117)
		tmp = (-b + sqrt(((b * b) - (4.0 * (a * c))))) / (2.0 * a);
	else
		tmp = -1.0 * (c / b);
	end
	tmp_2 = tmp;
end
code[a_, b_, c_] := If[LessEqual[b, -5e+153], N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision], If[LessEqual[b, 2.6e-117], N[(N[((-b) + N[Sqrt[N[(N[(b * b), $MachinePrecision] - N[(4.0 * N[(a * c), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] / N[(2.0 * a), $MachinePrecision]), $MachinePrecision], N[(-1.0 * N[(c / b), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;b \leq -5 \cdot 10^{+153}:\\
\;\;\;\;-1 \cdot \frac{b}{a}\\

\mathbf{elif}\;b \leq 2.6 \cdot 10^{-117}:\\
\;\;\;\;\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}\\

\mathbf{else}:\\
\;\;\;\;-1 \cdot \frac{c}{b}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if b < -5.00000000000000018e153

    1. Initial program 45.8%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative45.8%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified45.8%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around -inf 98.9%

      \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]

    if -5.00000000000000018e153 < b < 2.59999999999999983e-117

    1. Initial program 82.9%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Add Preprocessing

    if 2.59999999999999983e-117 < b

    1. Initial program 17.9%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative17.9%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified17.9%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around inf 86.7%

      \[\leadsto \color{blue}{-1 \cdot \frac{c}{b}} \]
  3. Recombined 3 regimes into one program.
  4. Add Preprocessing

Alternative 3: 80.4% accurate, 0.9× speedup?

\[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;b \leq -4.35 \cdot 10^{-42}:\\ \;\;\;\;-1 \cdot \frac{b}{a}\\ \mathbf{elif}\;b \leq 2.85 \cdot 10^{-112}:\\ \;\;\;\;\frac{\sqrt{a \cdot \left(c \cdot -4\right)}}{a \cdot 2} - 0.5 \cdot \frac{b}{a}\\ \mathbf{else}:\\ \;\;\;\;-1 \cdot \frac{c}{b}\\ \end{array} \end{array} \]
(FPCore (a b c)
 :precision binary64
 (if (<= b -4.35e-42)
   (* -1.0 (/ b a))
   (if (<= b 2.85e-112)
     (- (/ (sqrt (* a (* c -4.0))) (* a 2.0)) (* 0.5 (/ b a)))
     (* -1.0 (/ c b)))))
double code(double a, double b, double c) {
	double tmp;
	if (b <= -4.35e-42) {
		tmp = -1.0 * (b / a);
	} else if (b <= 2.85e-112) {
		tmp = (sqrt((a * (c * -4.0))) / (a * 2.0)) - (0.5 * (b / a));
	} else {
		tmp = -1.0 * (c / b);
	}
	return tmp;
}
real(8) function code(a, b, c)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    real(8), intent (in) :: c
    real(8) :: tmp
    if (b <= (-4.35d-42)) then
        tmp = (-1.0d0) * (b / a)
    else if (b <= 2.85d-112) then
        tmp = (sqrt((a * (c * (-4.0d0)))) / (a * 2.0d0)) - (0.5d0 * (b / a))
    else
        tmp = (-1.0d0) * (c / b)
    end if
    code = tmp
end function
public static double code(double a, double b, double c) {
	double tmp;
	if (b <= -4.35e-42) {
		tmp = -1.0 * (b / a);
	} else if (b <= 2.85e-112) {
		tmp = (Math.sqrt((a * (c * -4.0))) / (a * 2.0)) - (0.5 * (b / a));
	} else {
		tmp = -1.0 * (c / b);
	}
	return tmp;
}
def code(a, b, c):
	tmp = 0
	if b <= -4.35e-42:
		tmp = -1.0 * (b / a)
	elif b <= 2.85e-112:
		tmp = (math.sqrt((a * (c * -4.0))) / (a * 2.0)) - (0.5 * (b / a))
	else:
		tmp = -1.0 * (c / b)
	return tmp
function code(a, b, c)
	tmp = 0.0
	if (b <= -4.35e-42)
		tmp = Float64(-1.0 * Float64(b / a));
	elseif (b <= 2.85e-112)
		tmp = Float64(Float64(sqrt(Float64(a * Float64(c * -4.0))) / Float64(a * 2.0)) - Float64(0.5 * Float64(b / a)));
	else
		tmp = Float64(-1.0 * Float64(c / b));
	end
	return tmp
end
function tmp_2 = code(a, b, c)
	tmp = 0.0;
	if (b <= -4.35e-42)
		tmp = -1.0 * (b / a);
	elseif (b <= 2.85e-112)
		tmp = (sqrt((a * (c * -4.0))) / (a * 2.0)) - (0.5 * (b / a));
	else
		tmp = -1.0 * (c / b);
	end
	tmp_2 = tmp;
end
code[a_, b_, c_] := If[LessEqual[b, -4.35e-42], N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision], If[LessEqual[b, 2.85e-112], N[(N[(N[Sqrt[N[(a * N[(c * -4.0), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] / N[(a * 2.0), $MachinePrecision]), $MachinePrecision] - N[(0.5 * N[(b / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(-1.0 * N[(c / b), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}

\\
\begin{array}{l}
\mathbf{if}\;b \leq -4.35 \cdot 10^{-42}:\\
\;\;\;\;-1 \cdot \frac{b}{a}\\

\mathbf{elif}\;b \leq 2.85 \cdot 10^{-112}:\\
\;\;\;\;\frac{\sqrt{a \cdot \left(c \cdot -4\right)}}{a \cdot 2} - 0.5 \cdot \frac{b}{a}\\

\mathbf{else}:\\
\;\;\;\;-1 \cdot \frac{c}{b}\\


\end{array}
\end{array}
Derivation
  1. Split input into 3 regimes
  2. if b < -4.34999999999999979e-42

    1. Initial program 67.9%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative67.9%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified67.9%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around -inf 89.3%

      \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]

    if -4.34999999999999979e-42 < b < 2.85000000000000008e-112

    1. Initial program 78.1%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative78.1%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      2. +-commutative78.1%

        \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} + \left(-b\right)}}{a \cdot 2} \]
      3. unsub-neg78.1%

        \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} - b}}{a \cdot 2} \]
      4. fma-neg78.1%

        \[\leadsto \frac{\sqrt{\color{blue}{\mathsf{fma}\left(b, b, -4 \cdot \left(a \cdot c\right)\right)}} - b}{a \cdot 2} \]
      5. *-commutative78.1%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -4 \cdot \color{blue}{\left(c \cdot a\right)}\right)} - b}{a \cdot 2} \]
      6. associate-*r*78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -\color{blue}{\left(4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
      7. distribute-lft-neg-in78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(-4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
      8. *-commutative78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \left(-\color{blue}{c \cdot 4}\right) \cdot a\right)} - b}{a \cdot 2} \]
      9. distribute-rgt-neg-in78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(c \cdot \left(-4\right)\right)} \cdot a\right)} - b}{a \cdot 2} \]
      10. associate-*r*78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{c \cdot \left(\left(-4\right) \cdot a\right)}\right)} - b}{a \cdot 2} \]
      11. metadata-eval78.2%

        \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(\color{blue}{-4} \cdot a\right)\right)} - b}{a \cdot 2} \]
    3. Simplified78.2%

      \[\leadsto \color{blue}{\frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(-4 \cdot a\right)\right)} - b}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around 0 70.5%

      \[\leadsto \frac{\sqrt{\color{blue}{-4 \cdot \left(a \cdot c\right)}} - b}{a \cdot 2} \]
    6. Step-by-step derivation
      1. sub-neg70.5%

        \[\leadsto \frac{\color{blue}{\sqrt{-4 \cdot \left(a \cdot c\right)} + \left(-b\right)}}{a \cdot 2} \]
      2. flip-+69.0%

        \[\leadsto \frac{\color{blue}{\frac{\sqrt{-4 \cdot \left(a \cdot c\right)} \cdot \sqrt{-4 \cdot \left(a \cdot c\right)} - \left(-b\right) \cdot \left(-b\right)}{\sqrt{-4 \cdot \left(a \cdot c\right)} - \left(-b\right)}}}{a \cdot 2} \]
      3. add-sqr-sqrt68.9%

        \[\leadsto \frac{\frac{\color{blue}{-4 \cdot \left(a \cdot c\right)} - \left(-b\right) \cdot \left(-b\right)}{\sqrt{-4 \cdot \left(a \cdot c\right)} - \left(-b\right)}}{a \cdot 2} \]
      4. *-commutative68.9%

        \[\leadsto \frac{\frac{\color{blue}{\left(a \cdot c\right) \cdot -4} - \left(-b\right) \cdot \left(-b\right)}{\sqrt{-4 \cdot \left(a \cdot c\right)} - \left(-b\right)}}{a \cdot 2} \]
      5. associate-*r*68.9%

        \[\leadsto \frac{\frac{\color{blue}{a \cdot \left(c \cdot -4\right)} - \left(-b\right) \cdot \left(-b\right)}{\sqrt{-4 \cdot \left(a \cdot c\right)} - \left(-b\right)}}{a \cdot 2} \]
      6. *-commutative68.9%

        \[\leadsto \frac{\frac{a \cdot \left(c \cdot -4\right) - \left(-b\right) \cdot \left(-b\right)}{\sqrt{\color{blue}{\left(a \cdot c\right) \cdot -4}} - \left(-b\right)}}{a \cdot 2} \]
      7. associate-*r*68.9%

        \[\leadsto \frac{\frac{a \cdot \left(c \cdot -4\right) - \left(-b\right) \cdot \left(-b\right)}{\sqrt{\color{blue}{a \cdot \left(c \cdot -4\right)}} - \left(-b\right)}}{a \cdot 2} \]
    7. Applied egg-rr68.9%

      \[\leadsto \frac{\color{blue}{\frac{a \cdot \left(c \cdot -4\right) - \left(-b\right) \cdot \left(-b\right)}{\sqrt{a \cdot \left(c \cdot -4\right)} - \left(-b\right)}}}{a \cdot 2} \]
    8. Step-by-step derivation
      1. Applied egg-rr70.5%

        \[\leadsto \color{blue}{\frac{\sqrt{a \cdot \left(c \cdot -4\right)}}{a \cdot 2} - 0.5 \cdot \frac{b}{a}} \]

      if 2.85000000000000008e-112 < b

      1. Initial program 17.9%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative17.9%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      3. Simplified17.9%

        \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around inf 86.7%

        \[\leadsto \color{blue}{-1 \cdot \frac{c}{b}} \]
    9. Recombined 3 regimes into one program.
    10. Add Preprocessing

    Alternative 4: 80.0% accurate, 1.0× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;b \leq -4.5 \cdot 10^{-47}:\\ \;\;\;\;-1 \cdot \frac{b}{a}\\ \mathbf{elif}\;b \leq 1.52 \cdot 10^{-120}:\\ \;\;\;\;\left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \frac{0.5}{a}\\ \mathbf{else}:\\ \;\;\;\;-1 \cdot \frac{c}{b}\\ \end{array} \end{array} \]
    (FPCore (a b c)
     :precision binary64
     (if (<= b -4.5e-47)
       (* -1.0 (/ b a))
       (if (<= b 1.52e-120)
         (* (- (sqrt (* a (* c -4.0))) b) (/ 0.5 a))
         (* -1.0 (/ c b)))))
    double code(double a, double b, double c) {
    	double tmp;
    	if (b <= -4.5e-47) {
    		tmp = -1.0 * (b / a);
    	} else if (b <= 1.52e-120) {
    		tmp = (sqrt((a * (c * -4.0))) - b) * (0.5 / a);
    	} else {
    		tmp = -1.0 * (c / b);
    	}
    	return tmp;
    }
    
    real(8) function code(a, b, c)
        real(8), intent (in) :: a
        real(8), intent (in) :: b
        real(8), intent (in) :: c
        real(8) :: tmp
        if (b <= (-4.5d-47)) then
            tmp = (-1.0d0) * (b / a)
        else if (b <= 1.52d-120) then
            tmp = (sqrt((a * (c * (-4.0d0)))) - b) * (0.5d0 / a)
        else
            tmp = (-1.0d0) * (c / b)
        end if
        code = tmp
    end function
    
    public static double code(double a, double b, double c) {
    	double tmp;
    	if (b <= -4.5e-47) {
    		tmp = -1.0 * (b / a);
    	} else if (b <= 1.52e-120) {
    		tmp = (Math.sqrt((a * (c * -4.0))) - b) * (0.5 / a);
    	} else {
    		tmp = -1.0 * (c / b);
    	}
    	return tmp;
    }
    
    def code(a, b, c):
    	tmp = 0
    	if b <= -4.5e-47:
    		tmp = -1.0 * (b / a)
    	elif b <= 1.52e-120:
    		tmp = (math.sqrt((a * (c * -4.0))) - b) * (0.5 / a)
    	else:
    		tmp = -1.0 * (c / b)
    	return tmp
    
    function code(a, b, c)
    	tmp = 0.0
    	if (b <= -4.5e-47)
    		tmp = Float64(-1.0 * Float64(b / a));
    	elseif (b <= 1.52e-120)
    		tmp = Float64(Float64(sqrt(Float64(a * Float64(c * -4.0))) - b) * Float64(0.5 / a));
    	else
    		tmp = Float64(-1.0 * Float64(c / b));
    	end
    	return tmp
    end
    
    function tmp_2 = code(a, b, c)
    	tmp = 0.0;
    	if (b <= -4.5e-47)
    		tmp = -1.0 * (b / a);
    	elseif (b <= 1.52e-120)
    		tmp = (sqrt((a * (c * -4.0))) - b) * (0.5 / a);
    	else
    		tmp = -1.0 * (c / b);
    	end
    	tmp_2 = tmp;
    end
    
    code[a_, b_, c_] := If[LessEqual[b, -4.5e-47], N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision], If[LessEqual[b, 1.52e-120], N[(N[(N[Sqrt[N[(a * N[(c * -4.0), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] - b), $MachinePrecision] * N[(0.5 / a), $MachinePrecision]), $MachinePrecision], N[(-1.0 * N[(c / b), $MachinePrecision]), $MachinePrecision]]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    \mathbf{if}\;b \leq -4.5 \cdot 10^{-47}:\\
    \;\;\;\;-1 \cdot \frac{b}{a}\\
    
    \mathbf{elif}\;b \leq 1.52 \cdot 10^{-120}:\\
    \;\;\;\;\left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \frac{0.5}{a}\\
    
    \mathbf{else}:\\
    \;\;\;\;-1 \cdot \frac{c}{b}\\
    
    
    \end{array}
    \end{array}
    
    Derivation
    1. Split input into 3 regimes
    2. if b < -4.5e-47

      1. Initial program 67.9%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative67.9%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      3. Simplified67.9%

        \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around -inf 89.3%

        \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]

      if -4.5e-47 < b < 1.52e-120

      1. Initial program 78.1%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative78.1%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
        2. +-commutative78.1%

          \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} + \left(-b\right)}}{a \cdot 2} \]
        3. unsub-neg78.1%

          \[\leadsto \frac{\color{blue}{\sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)} - b}}{a \cdot 2} \]
        4. fma-neg78.1%

          \[\leadsto \frac{\sqrt{\color{blue}{\mathsf{fma}\left(b, b, -4 \cdot \left(a \cdot c\right)\right)}} - b}{a \cdot 2} \]
        5. *-commutative78.1%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -4 \cdot \color{blue}{\left(c \cdot a\right)}\right)} - b}{a \cdot 2} \]
        6. associate-*r*78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, -\color{blue}{\left(4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
        7. distribute-lft-neg-in78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(-4 \cdot c\right) \cdot a}\right)} - b}{a \cdot 2} \]
        8. *-commutative78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \left(-\color{blue}{c \cdot 4}\right) \cdot a\right)} - b}{a \cdot 2} \]
        9. distribute-rgt-neg-in78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{\left(c \cdot \left(-4\right)\right)} \cdot a\right)} - b}{a \cdot 2} \]
        10. associate-*r*78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, \color{blue}{c \cdot \left(\left(-4\right) \cdot a\right)}\right)} - b}{a \cdot 2} \]
        11. metadata-eval78.2%

          \[\leadsto \frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(\color{blue}{-4} \cdot a\right)\right)} - b}{a \cdot 2} \]
      3. Simplified78.2%

        \[\leadsto \color{blue}{\frac{\sqrt{\mathsf{fma}\left(b, b, c \cdot \left(-4 \cdot a\right)\right)} - b}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around 0 70.5%

        \[\leadsto \frac{\sqrt{\color{blue}{-4 \cdot \left(a \cdot c\right)}} - b}{a \cdot 2} \]
      6. Step-by-step derivation
        1. div-inv70.4%

          \[\leadsto \color{blue}{\left(\sqrt{-4 \cdot \left(a \cdot c\right)} - b\right) \cdot \frac{1}{a \cdot 2}} \]
        2. *-commutative70.4%

          \[\leadsto \left(\sqrt{\color{blue}{\left(a \cdot c\right) \cdot -4}} - b\right) \cdot \frac{1}{a \cdot 2} \]
        3. associate-*r*70.5%

          \[\leadsto \left(\sqrt{\color{blue}{a \cdot \left(c \cdot -4\right)}} - b\right) \cdot \frac{1}{a \cdot 2} \]
        4. metadata-eval70.5%

          \[\leadsto \left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \frac{1}{a \cdot \color{blue}{\frac{1}{0.5}}} \]
        5. div-inv70.5%

          \[\leadsto \left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \frac{1}{\color{blue}{\frac{a}{0.5}}} \]
        6. clear-num70.5%

          \[\leadsto \left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \color{blue}{\frac{0.5}{a}} \]
      7. Applied egg-rr70.5%

        \[\leadsto \color{blue}{\left(\sqrt{a \cdot \left(c \cdot -4\right)} - b\right) \cdot \frac{0.5}{a}} \]

      if 1.52e-120 < b

      1. Initial program 17.9%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative17.9%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      3. Simplified17.9%

        \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around inf 86.7%

        \[\leadsto \color{blue}{-1 \cdot \frac{c}{b}} \]
    3. Recombined 3 regimes into one program.
    4. Add Preprocessing

    Alternative 5: 66.6% accurate, 11.6× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} \mathbf{if}\;b \leq -5 \cdot 10^{-311}:\\ \;\;\;\;-1 \cdot \frac{b}{a}\\ \mathbf{else}:\\ \;\;\;\;-1 \cdot \frac{c}{b}\\ \end{array} \end{array} \]
    (FPCore (a b c)
     :precision binary64
     (if (<= b -5e-311) (* -1.0 (/ b a)) (* -1.0 (/ c b))))
    double code(double a, double b, double c) {
    	double tmp;
    	if (b <= -5e-311) {
    		tmp = -1.0 * (b / a);
    	} else {
    		tmp = -1.0 * (c / b);
    	}
    	return tmp;
    }
    
    real(8) function code(a, b, c)
        real(8), intent (in) :: a
        real(8), intent (in) :: b
        real(8), intent (in) :: c
        real(8) :: tmp
        if (b <= (-5d-311)) then
            tmp = (-1.0d0) * (b / a)
        else
            tmp = (-1.0d0) * (c / b)
        end if
        code = tmp
    end function
    
    public static double code(double a, double b, double c) {
    	double tmp;
    	if (b <= -5e-311) {
    		tmp = -1.0 * (b / a);
    	} else {
    		tmp = -1.0 * (c / b);
    	}
    	return tmp;
    }
    
    def code(a, b, c):
    	tmp = 0
    	if b <= -5e-311:
    		tmp = -1.0 * (b / a)
    	else:
    		tmp = -1.0 * (c / b)
    	return tmp
    
    function code(a, b, c)
    	tmp = 0.0
    	if (b <= -5e-311)
    		tmp = Float64(-1.0 * Float64(b / a));
    	else
    		tmp = Float64(-1.0 * Float64(c / b));
    	end
    	return tmp
    end
    
    function tmp_2 = code(a, b, c)
    	tmp = 0.0;
    	if (b <= -5e-311)
    		tmp = -1.0 * (b / a);
    	else
    		tmp = -1.0 * (c / b);
    	end
    	tmp_2 = tmp;
    end
    
    code[a_, b_, c_] := If[LessEqual[b, -5e-311], N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision], N[(-1.0 * N[(c / b), $MachinePrecision]), $MachinePrecision]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    \mathbf{if}\;b \leq -5 \cdot 10^{-311}:\\
    \;\;\;\;-1 \cdot \frac{b}{a}\\
    
    \mathbf{else}:\\
    \;\;\;\;-1 \cdot \frac{c}{b}\\
    
    
    \end{array}
    \end{array}
    
    Derivation
    1. Split input into 2 regimes
    2. if b < -5.00000000000023e-311

      1. Initial program 73.3%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative73.3%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      3. Simplified73.3%

        \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around -inf 68.1%

        \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]

      if -5.00000000000023e-311 < b

      1. Initial program 26.9%

        \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
      2. Step-by-step derivation
        1. *-commutative26.9%

          \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
      3. Simplified26.9%

        \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
      4. Add Preprocessing
      5. Taylor expanded in b around inf 73.9%

        \[\leadsto \color{blue}{-1 \cdot \frac{c}{b}} \]
    3. Recombined 2 regimes into one program.
    4. Add Preprocessing

    Alternative 6: 34.7% accurate, 23.2× speedup?

    \[\begin{array}{l} \\ -1 \cdot \frac{b}{a} \end{array} \]
    (FPCore (a b c) :precision binary64 (* -1.0 (/ b a)))
    double code(double a, double b, double c) {
    	return -1.0 * (b / a);
    }
    
    real(8) function code(a, b, c)
        real(8), intent (in) :: a
        real(8), intent (in) :: b
        real(8), intent (in) :: c
        code = (-1.0d0) * (b / a)
    end function
    
    public static double code(double a, double b, double c) {
    	return -1.0 * (b / a);
    }
    
    def code(a, b, c):
    	return -1.0 * (b / a)
    
    function code(a, b, c)
    	return Float64(-1.0 * Float64(b / a))
    end
    
    function tmp = code(a, b, c)
    	tmp = -1.0 * (b / a);
    end
    
    code[a_, b_, c_] := N[(-1.0 * N[(b / a), $MachinePrecision]), $MachinePrecision]
    
    \begin{array}{l}
    
    \\
    -1 \cdot \frac{b}{a}
    \end{array}
    
    Derivation
    1. Initial program 49.4%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative49.4%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified49.4%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Taylor expanded in b around -inf 34.5%

      \[\leadsto \color{blue}{-1 \cdot \frac{b}{a}} \]
    6. Add Preprocessing

    Alternative 7: 2.5% accurate, 38.7× speedup?

    \[\begin{array}{l} \\ \frac{b}{a} \end{array} \]
    (FPCore (a b c) :precision binary64 (/ b a))
    double code(double a, double b, double c) {
    	return b / a;
    }
    
    real(8) function code(a, b, c)
        real(8), intent (in) :: a
        real(8), intent (in) :: b
        real(8), intent (in) :: c
        code = b / a
    end function
    
    public static double code(double a, double b, double c) {
    	return b / a;
    }
    
    def code(a, b, c):
    	return b / a
    
    function code(a, b, c)
    	return Float64(b / a)
    end
    
    function tmp = code(a, b, c)
    	tmp = b / a;
    end
    
    code[a_, b_, c_] := N[(b / a), $MachinePrecision]
    
    \begin{array}{l}
    
    \\
    \frac{b}{a}
    \end{array}
    
    Derivation
    1. Initial program 49.4%

      \[\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a} \]
    2. Step-by-step derivation
      1. *-commutative49.4%

        \[\leadsto \frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{\color{blue}{a \cdot 2}} \]
    3. Simplified49.4%

      \[\leadsto \color{blue}{\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{a \cdot 2}} \]
    4. Add Preprocessing
    5. Applied egg-rr23.7%

      \[\leadsto \frac{\color{blue}{{\left(\sqrt{b + \mathsf{hypot}\left(b, \sqrt{a \cdot \left(c \cdot -4\right)}\right)}\right)}^{2}}}{a \cdot 2} \]
    6. Taylor expanded in b around inf 2.4%

      \[\leadsto \color{blue}{\frac{b}{a}} \]
    7. Add Preprocessing

    Developer target: 99.7% accurate, 0.1× speedup?

    \[\begin{array}{l} \\ \begin{array}{l} t_0 := \left|\frac{b}{2}\right|\\ t_1 := \sqrt{\left|a\right|} \cdot \sqrt{\left|c\right|}\\ t_2 := \begin{array}{l} \mathbf{if}\;\mathsf{copysign}\left(a, c\right) = a:\\ \;\;\;\;\sqrt{t\_0 - t\_1} \cdot \sqrt{t\_0 + t\_1}\\ \mathbf{else}:\\ \;\;\;\;\mathsf{hypot}\left(\frac{b}{2}, t\_1\right)\\ \end{array}\\ \mathbf{if}\;b < 0:\\ \;\;\;\;\frac{t\_2 - \frac{b}{2}}{a}\\ \mathbf{else}:\\ \;\;\;\;\frac{-c}{\frac{b}{2} + t\_2}\\ \end{array} \end{array} \]
    (FPCore (a b c)
     :precision binary64
     (let* ((t_0 (fabs (/ b 2.0)))
            (t_1 (* (sqrt (fabs a)) (sqrt (fabs c))))
            (t_2
             (if (== (copysign a c) a)
               (* (sqrt (- t_0 t_1)) (sqrt (+ t_0 t_1)))
               (hypot (/ b 2.0) t_1))))
       (if (< b 0.0) (/ (- t_2 (/ b 2.0)) a) (/ (- c) (+ (/ b 2.0) t_2)))))
    double code(double a, double b, double c) {
    	double t_0 = fabs((b / 2.0));
    	double t_1 = sqrt(fabs(a)) * sqrt(fabs(c));
    	double tmp;
    	if (copysign(a, c) == a) {
    		tmp = sqrt((t_0 - t_1)) * sqrt((t_0 + t_1));
    	} else {
    		tmp = hypot((b / 2.0), t_1);
    	}
    	double t_2 = tmp;
    	double tmp_1;
    	if (b < 0.0) {
    		tmp_1 = (t_2 - (b / 2.0)) / a;
    	} else {
    		tmp_1 = -c / ((b / 2.0) + t_2);
    	}
    	return tmp_1;
    }
    
    public static double code(double a, double b, double c) {
    	double t_0 = Math.abs((b / 2.0));
    	double t_1 = Math.sqrt(Math.abs(a)) * Math.sqrt(Math.abs(c));
    	double tmp;
    	if (Math.copySign(a, c) == a) {
    		tmp = Math.sqrt((t_0 - t_1)) * Math.sqrt((t_0 + t_1));
    	} else {
    		tmp = Math.hypot((b / 2.0), t_1);
    	}
    	double t_2 = tmp;
    	double tmp_1;
    	if (b < 0.0) {
    		tmp_1 = (t_2 - (b / 2.0)) / a;
    	} else {
    		tmp_1 = -c / ((b / 2.0) + t_2);
    	}
    	return tmp_1;
    }
    
    def code(a, b, c):
    	t_0 = math.fabs((b / 2.0))
    	t_1 = math.sqrt(math.fabs(a)) * math.sqrt(math.fabs(c))
    	tmp = 0
    	if math.copysign(a, c) == a:
    		tmp = math.sqrt((t_0 - t_1)) * math.sqrt((t_0 + t_1))
    	else:
    		tmp = math.hypot((b / 2.0), t_1)
    	t_2 = tmp
    	tmp_1 = 0
    	if b < 0.0:
    		tmp_1 = (t_2 - (b / 2.0)) / a
    	else:
    		tmp_1 = -c / ((b / 2.0) + t_2)
    	return tmp_1
    
    function code(a, b, c)
    	t_0 = abs(Float64(b / 2.0))
    	t_1 = Float64(sqrt(abs(a)) * sqrt(abs(c)))
    	tmp = 0.0
    	if (copysign(a, c) == a)
    		tmp = Float64(sqrt(Float64(t_0 - t_1)) * sqrt(Float64(t_0 + t_1)));
    	else
    		tmp = hypot(Float64(b / 2.0), t_1);
    	end
    	t_2 = tmp
    	tmp_1 = 0.0
    	if (b < 0.0)
    		tmp_1 = Float64(Float64(t_2 - Float64(b / 2.0)) / a);
    	else
    		tmp_1 = Float64(Float64(-c) / Float64(Float64(b / 2.0) + t_2));
    	end
    	return tmp_1
    end
    
    function tmp_3 = code(a, b, c)
    	t_0 = abs((b / 2.0));
    	t_1 = sqrt(abs(a)) * sqrt(abs(c));
    	tmp = 0.0;
    	if ((sign(c) * abs(a)) == a)
    		tmp = sqrt((t_0 - t_1)) * sqrt((t_0 + t_1));
    	else
    		tmp = hypot((b / 2.0), t_1);
    	end
    	t_2 = tmp;
    	tmp_2 = 0.0;
    	if (b < 0.0)
    		tmp_2 = (t_2 - (b / 2.0)) / a;
    	else
    		tmp_2 = -c / ((b / 2.0) + t_2);
    	end
    	tmp_3 = tmp_2;
    end
    
    code[a_, b_, c_] := Block[{t$95$0 = N[Abs[N[(b / 2.0), $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[(N[Sqrt[N[Abs[a], $MachinePrecision]], $MachinePrecision] * N[Sqrt[N[Abs[c], $MachinePrecision]], $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = If[Equal[N[With[{TMP1 = Abs[a], TMP2 = Sign[c]}, TMP1 * If[TMP2 == 0, 1, TMP2]], $MachinePrecision], a], N[(N[Sqrt[N[(t$95$0 - t$95$1), $MachinePrecision]], $MachinePrecision] * N[Sqrt[N[(t$95$0 + t$95$1), $MachinePrecision]], $MachinePrecision]), $MachinePrecision], N[Sqrt[N[(b / 2.0), $MachinePrecision] ^ 2 + t$95$1 ^ 2], $MachinePrecision]]}, If[Less[b, 0.0], N[(N[(t$95$2 - N[(b / 2.0), $MachinePrecision]), $MachinePrecision] / a), $MachinePrecision], N[((-c) / N[(N[(b / 2.0), $MachinePrecision] + t$95$2), $MachinePrecision]), $MachinePrecision]]]]]
    
    \begin{array}{l}
    
    \\
    \begin{array}{l}
    t_0 := \left|\frac{b}{2}\right|\\
    t_1 := \sqrt{\left|a\right|} \cdot \sqrt{\left|c\right|}\\
    t_2 := \begin{array}{l}
    \mathbf{if}\;\mathsf{copysign}\left(a, c\right) = a:\\
    \;\;\;\;\sqrt{t\_0 - t\_1} \cdot \sqrt{t\_0 + t\_1}\\
    
    \mathbf{else}:\\
    \;\;\;\;\mathsf{hypot}\left(\frac{b}{2}, t\_1\right)\\
    
    
    \end{array}\\
    \mathbf{if}\;b < 0:\\
    \;\;\;\;\frac{t\_2 - \frac{b}{2}}{a}\\
    
    \mathbf{else}:\\
    \;\;\;\;\frac{-c}{\frac{b}{2} + t\_2}\\
    
    
    \end{array}
    \end{array}
    

    Reproduce

    ?
    herbie shell --seed 2024050 -o generate:simplify
    (FPCore (a b c)
      :name "quadp (p42, positive)"
      :precision binary64
      :herbie-expected 10
    
      :alt
      (if (< b 0.0) (/ (- (if (== (copysign a c) a) (* (sqrt (- (fabs (/ b 2.0)) (* (sqrt (fabs a)) (sqrt (fabs c))))) (sqrt (+ (fabs (/ b 2.0)) (* (sqrt (fabs a)) (sqrt (fabs c)))))) (hypot (/ b 2.0) (* (sqrt (fabs a)) (sqrt (fabs c))))) (/ b 2.0)) a) (/ (- c) (+ (/ b 2.0) (if (== (copysign a c) a) (* (sqrt (- (fabs (/ b 2.0)) (* (sqrt (fabs a)) (sqrt (fabs c))))) (sqrt (+ (fabs (/ b 2.0)) (* (sqrt (fabs a)) (sqrt (fabs c)))))) (hypot (/ b 2.0) (* (sqrt (fabs a)) (sqrt (fabs c))))))))
    
      (/ (+ (- b) (sqrt (- (* b b) (* 4.0 (* a c))))) (* 2.0 a)))