Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
x == (-8+sqrt 124)/2 or x == (-8-sqrt 124)/2
⇒ algebra.equations.quadratic.simpler-sqrtx == -4+sqrt 31 or x == -4-sqrt 31
Description
solve a quadratic equation without abc-formula