Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
x == (-4+sqrt 80)/4 or x == (-4-4*sqrt 5)/4
⇒ algebra.equations.quadratic.distr-divx == (-4+sqrt 80)/4 or x == -1-4*sqrt 5/4
Description
solve a quadratic equation without abc-formula