Average Error: 0.0 → 0.0
Time: 4.3s
Precision: 64
\[a \cdot a - b \cdot b\]
↓
\[\left(a + b\right) \cdot \left(a - b\right)\]
a \cdot a - b \cdot b
↓
\left(a + b\right) \cdot \left(a - b\right)
double f(double a, double b) {
        double r1288782 = a;
        double r1288783 = r1288782 * r1288782;
        double r1288784 = b;
        double r1288785 = r1288784 * r1288784;
        double r1288786 = r1288783 - r1288785;
        return r1288786;
}
↓
double f(double a, double b) {
        double r1288787 = a;
        double r1288788 = b;
        double r1288789 = r1288787 + r1288788;
        double r1288790 = r1288787 - r1288788;
        double r1288791 = r1288789 * r1288790;
        return r1288791;
}

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

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

  4. Final simplification0.0

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

Reproduce

herbie shell --seed 2019154 +o rules:numerics
(FPCore (a b)
  :name "Difference of squares"

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

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