Exercise algebra.inequalities.quadratic

Description
solve a quadratic inequation

Derivation

x^2+9*x < 3*x-5

⇒ algebra.inequalities.to-equation, clipboard=[ineq == (x^2+9*x < 3*x-5)]

x^2+9*x == 3*x-5

⇒ algebra.equations.quadratic.move-left

x^2+6*x+5 == 0

⇒ algebra.equations.quadratic.nice-factors

(x+1)*(x+5) == 0

⇒ algebra.equations.quadratic.product-zero

x == -1 or x == -5

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

-5 < x < -1