Error

Derivation

1. Initial program 15.6

   \[\sqrt[3]{\frac{g}{2 \cdot a}}\]
2. Using strategy rm

3. Applied cbrt-div0.8

   \[\leadsto \color{blue}{\frac{\sqrt[3]{g}}{\sqrt[3]{2 \cdot a}}}\]
4. Using strategy rm

5. Applied add-cbrt-cube1.0

   \[\leadsto \frac{\sqrt[3]{g}}{\color{blue}{\sqrt[3]{\left(\sqrt[3]{2 \cdot a} \cdot \sqrt[3]{2 \cdot a}\right) \cdot \sqrt[3]{2 \cdot a}}}}\]

6. Final simplification1.0

   \[\leadsto \frac{\sqrt[3]{g}}{\sqrt[3]{\sqrt[3]{2 \cdot a} \cdot \left(\sqrt[3]{2 \cdot a} \cdot \sqrt[3]{2 \cdot a}\right)}}\]

Reproduce

herbie shell --seed 2019050 
(FPCore (g a)
  :name "2-ancestry mixing, zero discriminant"
  (cbrt (/ g (* 2 a))))