Exercise algebra.inequalities.quadratic

Description
solve a quadratic inequation

Derivation

4*x^2+6*x == x^2+3*x+18

⇒ algebra.equations.quadratic.move-left

3*x^2+3*x-18 == 0

⇒ algebra.equations.quadratic.simpler-poly

x^2+x-6 == 0

⇒ algebra.equations.quadratic.nice-factors

(x-2)*(x+3) == 0

⇒ algebra.equations.quadratic.product-zero

x == 2 or x == -3