Exercise algebra.inequalities.quadratic
Description
solve a quadratic inequation
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
1/2*x^2-3*x-8 == 0
⇒ algebra.equations.quadratic.simpler-polyx^2-6*x-16 == 0
⇒ algebra.equations.quadratic.nice-factors(x+2)*(x-8) == 0
⇒ algebra.equations.quadratic.product-zerox == -2 or x == 8