Average Error: 0.0 → 0.0
Time: 14.3s
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 r4060143 = a;
        double r4060144 = r4060143 * r4060143;
        double r4060145 = b;
        double r4060146 = r4060145 * r4060145;
        double r4060147 = r4060144 - r4060146;
        return r4060147;
}
↓
double f(double a, double b) {
        double r4060148 = a;
        double r4060149 = b;
        double r4060150 = r4060148 + r4060149;
        double r4060151 = r4060148 - r4060149;
        double r4060152 = r4060150 * r4060151;
        return r4060152;
}

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 -inf 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 2019142 +o rules:numerics
(FPCore (a b)
  :name "Difference of squares"

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

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