Quadratic equation hacks using the discriminant
Solve x^2- 4x+ 5 using a discriminant:
Discriminant is:
Discriminant = b^2- 4ac
Discriminant = (-4)^2 - 4(1)(5)
Discriminant = 16 - 20
Discriminant = -4
When Discriminant < 0, the quadratic has no solution
