Average Error: 0.0 → 0.0
Time: 4.8s
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 r77296 = a;
        double r77297 = r77296 * r77296;
        double r77298 = b;
        double r77299 = r77298 * r77298;
        double r77300 = r77297 - r77299;
        return r77300;
}
↓
double f(double a, double b) {
        double r77301 = a;
        double r77302 = b;
        double r77303 = r77301 - r77302;
        double r77304 = r77301 + r77302;
        double r77305 = r77303 * r77304;
        return r77305;
}

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. Simplified0.0

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

  3. Final simplification0.0

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

Reproduce

herbie shell --seed 2020047 +o rules:numerics
(FPCore (a b)
  :name "Difference of squares"
  :precision binary64

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

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