Average Error: 44.1 → 0.2
Time: 30.8s
Precision: 64
Internal Precision: 576
\[\frac{\left(-b\right) + \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]
\[\frac{c \cdot -2}{b + \sqrt{b \cdot b + \left(-4 \cdot c\right) \cdot a}}\]

Error

Bits error versus a

Bits error versus b

Bits error versus c

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 44.1

    \[\frac{\left(-b\right) + \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]
  2. Initial simplification44.1

    \[\leadsto \frac{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} - b}{2 \cdot a}\]
  3. Using strategy rm
  4. Applied flip--44.1

    \[\leadsto \frac{\color{blue}{\frac{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} \cdot \sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} - b \cdot b}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}}}{2 \cdot a}\]
  5. Applied associate-/l/44.1

    \[\leadsto \color{blue}{\frac{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} \cdot \sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} - b \cdot b}{\left(2 \cdot a\right) \cdot \left(\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b\right)}}\]
  6. Simplified0.4

    \[\leadsto \frac{\color{blue}{\left(c \cdot -4\right) \cdot a}}{\left(2 \cdot a\right) \cdot \left(\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b\right)}\]
  7. Using strategy rm
  8. Applied times-frac0.4

    \[\leadsto \color{blue}{\frac{c \cdot -4}{2 \cdot a} \cdot \frac{a}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}}\]
  9. Simplified0.4

    \[\leadsto \color{blue}{\frac{\frac{c}{\frac{-1}{2}}}{a}} \cdot \frac{a}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}\]
  10. Using strategy rm
  11. Applied pow10.4

    \[\leadsto \frac{\frac{c}{\frac{-1}{2}}}{a} \cdot \color{blue}{{\left(\frac{a}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}\right)}^{1}}\]
  12. Applied pow10.4

    \[\leadsto \color{blue}{{\left(\frac{\frac{c}{\frac{-1}{2}}}{a}\right)}^{1}} \cdot {\left(\frac{a}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}\right)}^{1}\]
  13. Applied pow-prod-down0.4

    \[\leadsto \color{blue}{{\left(\frac{\frac{c}{\frac{-1}{2}}}{a} \cdot \frac{a}{\sqrt{b \cdot b - \left(c \cdot a\right) \cdot 4} + b}\right)}^{1}}\]
  14. Simplified0.2

    \[\leadsto {\color{blue}{\left(\frac{c \cdot -2}{\sqrt{\left(c \cdot -4\right) \cdot a + b \cdot b} + b}\right)}}^{1}\]
  15. Final simplification0.2

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

Runtime

Time bar (total: 30.8s)Debug logProfile

herbie shell --seed 2018255 
(FPCore (a b c)
  :name "Quadratic roots, medium range"
  :pre (and (< 1.1102230246251565e-16 a 9007199254740992.0) (< 1.1102230246251565e-16 b 9007199254740992.0) (< 1.1102230246251565e-16 c 9007199254740992.0))
  (/ (+ (- b) (sqrt (- (* b b) (* (* 4 a) c)))) (* 2 a)))