Average Error: 0.0 → 0.0
Time: 5.0s
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 r1517520 = a;
        double r1517521 = r1517520 * r1517520;
        double r1517522 = b;
        double r1517523 = r1517522 * r1517522;
        double r1517524 = r1517521 - r1517523;
        return r1517524;
}
↓
double f(double a, double b) {
        double r1517525 = b;
        double r1517526 = a;
        double r1517527 = r1517525 + r1517526;
        double r1517528 = r1517526 - r1517525;
        double r1517529 = r1517527 * r1517528;
        return r1517529;
}

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. Using strategy rm

  3. Applied difference-of-squares0.0

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

  4. Final simplification0.0

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

Reproduce

herbie shell --seed 2019151 +o rules:numerics
(FPCore (a b)
  :name "Difference of squares"

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

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