Average Error: 23.6 → 23.6
Time: 1.1s
Precision: binary64
\[\sqrt{{x}^{2} + 4} - x\]
↓
\[\sqrt{{x}^{2} + 4} - x\]
\sqrt{{x}^{2} + 4} - x
↓
\sqrt{{x}^{2} + 4} - x
double code(double x) {
	return ((double) (((double) sqrt(((double) (((double) pow(x, 2.0)) + 4.0)))) - x));
}
↓
double code(double x) {
	return ((double) (((double) sqrt(((double) (((double) pow(x, 2.0)) + 4.0)))) - x));
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 23.6

    \[\sqrt{{x}^{2} + 4} - x\]

  2. Final simplification23.6

    \[\leadsto \sqrt{{x}^{2} + 4} - x\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(- (sqrt (+ (pow x 2) 4)) x)"
  :precision binary64
  (- (sqrt (+ (pow x 2.0) 4.0)) x))