Zero Product Property- If the producto of 2 or more factors is zero, then one of the factors must be zero.

2x^2-6x-8=0

2x(x-6x-8) ------- Factor out the greates common factor x^2

2x(x-4x-2)--------factor both -6 and -8. -4 and -2 both can get to -6 and -8.

(x+2) (x-4) (x-2)-----------distribute the x variable.
-2 4 2