Solve equation by factoring 7x^2-13-2=0

7x^2-13-2=0 iff
(7x + 1)(x - 2) = 0 iff
x = -1/7 or x = 2

Supposing you meant:
7x^2-13x-2=0
Factor:
(x - 2) (7x + 1) = 0
Use the zero product principle twice:
x = 2, -1/7

use the quadratic formula

I assume you mean: 7x^2-13x-2

(7x - 1) (x + 2)