Exercise algebra.inequalities.quadratic

Description
solve a quadratic inequation

Derivation

x^2+3*x-4 < 0

⇒ algebra.inequalities.to-equation, clipboard=[ineq == (x^2+3*x-4 < 0)]

x^2+3*x-4 == 0

⇒ algebra.equations.quadratic.nice-factors

(x-1)*(x+4) == 0

⇒ algebra.equations.quadratic.product-zero

x == 1 or x == -4

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

-4 < x < 1