Exercise algebra.inequalities.quadratic

Description
solve a quadratic inequation

Derivation

x^2-4*x-12 > 0

⇒ algebra.inequalities.to-equation, clipboard=[ineq == (x^2-4*x-12 > 0)]

x^2-4*x-12 == 0

⇒ algebra.equations.quadratic.nice-factors

(x+2)*(x-6) == 0

⇒ algebra.equations.quadratic.product-zero

x == -2 or x == 6

⇒ algebra.inequalities.give-solution, clipboard=[]

x < -2 or x > 6