Average Error: 0.0 → 0.0
Time: 13.0s
Precision: 64
\[a \cdot a - b \cdot b\]
↓
\[\left(b + a\right) \cdot \left(a - b\right)\]
a \cdot a - b \cdot b
↓
\left(b + a\right) \cdot \left(a - b\right)
double f(double a, double b) {
        double r2385775 = a;
        double r2385776 = r2385775 * r2385775;
        double r2385777 = b;
        double r2385778 = r2385777 * r2385777;
        double r2385779 = r2385776 - r2385778;
        return r2385779;
}
↓
double f(double a, double b) {
        double r2385780 = b;
        double r2385781 = a;
        double r2385782 = r2385780 + r2385781;
        double r2385783 = r2385781 - r2385780;
        double r2385784 = r2385782 * r2385783;
        return r2385784;
}

Error

Bits error versus a

Bits error versus b

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Target

Original0.0
Target0.0
Herbie0.0
\[\left(a + b\right) \cdot \left(a - b\right)\]

Derivation

  1. Initial program 0.0

    \[a \cdot a - b \cdot b\]

  2. Taylor expanded around 0 0.0

    \[\leadsto \color{blue}{{a}^{2} - {b}^{2}}\]

  3. Simplified0.0

    \[\leadsto \color{blue}{\left(a + b\right) \cdot \left(a - b\right)}\]

  4. Final simplification0.0

    \[\leadsto \left(b + a\right) \cdot \left(a - b\right)\]

Reproduce

herbie shell --seed 2019141 +o rules:numerics
(FPCore (a b)
  :name "Difference of squares"

  :herbie-target
  (* (+ a b) (- a b))

  (- (* a a) (* b b)))