X2 - 2x - 8 = 0 or, x2 - 4x + 2x - 8 = 0 or, x(x - 4) + 2(x - 4) = 0 or, (x - 4)(x + 2) = 0 Either, x - 4 = 0 i.e x = 4 or, x + 2 = 0 i.e x = -2 So, x = -2, 4

Didn't find the answer you were looking for?