Average Error: 0.5 → 0.5
Time: 2.9s
Precision: 64
\[\sqrt{x - 1} \cdot \sqrt{x}\]
↓
\[\sqrt{1} \cdot \left(\sqrt{x - 1} \cdot \sqrt{x}\right)\]
\sqrt{x - 1} \cdot \sqrt{x}
↓
\sqrt{1} \cdot \left(\sqrt{x - 1} \cdot \sqrt{x}\right)
double f(double x) {
        double r7506 = x;
        double r7507 = 1.0;
        double r7508 = r7506 - r7507;
        double r7509 = sqrt(r7508);
        double r7510 = sqrt(r7506);
        double r7511 = r7509 * r7510;
        return r7511;
}
↓
double f(double x) {
        double r7512 = 1.0;
        double r7513 = sqrt(r7512);
        double r7514 = x;
        double r7515 = 1.0;
        double r7516 = r7514 - r7515;
        double r7517 = sqrt(r7516);
        double r7518 = sqrt(r7514);
        double r7519 = r7517 * r7518;
        double r7520 = r7513 * r7519;
        return r7520;
}

Error

Bits error versus x

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.5

    \[\sqrt{x - 1} \cdot \sqrt{x}\]
  2. Using strategy rm

  3. Applied *-un-lft-identity0.5

    \[\leadsto \sqrt{\color{blue}{1 \cdot \left(x - 1\right)}} \cdot \sqrt{x}\]

  4. Applied sqrt-prod0.5

    \[\leadsto \color{blue}{\left(\sqrt{1} \cdot \sqrt{x - 1}\right)} \cdot \sqrt{x}\]

  5. Applied associate-*l*0.5

    \[\leadsto \color{blue}{\sqrt{1} \cdot \left(\sqrt{x - 1} \cdot \sqrt{x}\right)}\]

  6. Final simplification0.5

    \[\leadsto \sqrt{1} \cdot \left(\sqrt{x - 1} \cdot \sqrt{x}\right)\]

Reproduce

herbie shell --seed 2020060 
(FPCore (x)
  :name "sqrt times"
  :precision binary64
  (* (sqrt (- x 1)) (sqrt x)))