Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
x == sqrt 28/2 or x == -sqrt 28/2
⇒ algebra.equations.quadratic.simpler-sqrtx == sqrt 7 or x == -sqrt 7
Description
solve a quadratic equation without abc-formula