solve x^3-5x^2-66=0

Question

you have to use some of the 6 factoring methods but i dont know how to go about the problem..

Answer 1

x^3-5x^2-66=0                    - 66 = -11*6 and -11 + 6 = -5

(x - 11)(x + 6)= 0

x - 11 = 0 ⇒ x = 11

and

x + 6 = 0 ⇒ x = - 6

Answer 2

+ 5 – 66=0

Answer 3

+ 5 – 66