Exercise algebra.equations.quadratic.no-abc
Description
solve a quadratic equation without abc-formula
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
6 == 14-2*x^2
⇒ algebra.equations.coverup.onevar.minus-right8 == 2*x^2
⇒ algebra.equations.coverup.times4 == x^2
⇒ algebra.equations.coverup.power2 == x or -2 == x
⇒ algebra.equations.linear.flipx == 2 or -2 == x
⇒ algebra.equations.linear.flipx == 2 or x == -2