Average Error: 22.3 → 22.3
Time: 1.4s
Precision: binary64
\[\left(-b\right) - \frac{\sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]
\[\left(-b\right) - \frac{\sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]

Error

Bits error versus b

Bits error versus a

Bits error versus c

Derivation

  1. Initial program 22.3

    \[\left(-b\right) - \frac{\sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]
  2. Final simplification22.3

    \[\leadsto \left(-b\right) - \frac{\sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\]

Reproduce

herbie shell --seed 2020153 
(FPCore (b a c)
  :name "(- (- b) (/ (sqrt (- (* b b) (* (* 4 a) c))) (* 2 a)))"
  :precision binary64
  (- (neg b) (/ (sqrt (- (* b b) (* (* 4.0 a) c))) (* 2.0 a))))