Average Error: 0.2 → 0.2
Time: 2.5s
Precision: binary64
\[9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)\]
↓
\[9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)\]
9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)
↓
9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)
double code(double x, double y) {
	return ((double) (((double) (9.0 * ((double) pow(x, 4.0)))) - ((double) (((double) pow(y, 2.0)) * ((double) (((double) pow(y, 2.0)) - 2.0))))));
}
↓
double code(double x, double y) {
	return ((double) (((double) (9.0 * ((double) pow(x, 4.0)))) - ((double) (((double) pow(y, 2.0)) * ((double) (((double) pow(y, 2.0)) - 2.0))))));
}

Error

Bits error versus x

Bits error versus y

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.2

    \[9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)\]

  2. Final simplification0.2

    \[\leadsto 9 \cdot {x}^{4} - {y}^{2} \cdot \left({y}^{2} - 2\right)\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x y)
  :name "(- (* 9 (pow x 4)) (* (pow y 2) (- (pow y 2) 2)))"
  :precision binary64
  (- (* 9.0 (pow x 4.0)) (* (pow y 2.0) (- (pow y 2.0) 2.0))))