f(x) = x5 - 2x4 + 3x3 - 6x2 - 4x + 8
f(2) = (2)5 - 2(2)4 + 3(2)3 - 6(2)2 - 4(2) + 8 = 0
Since f(2) = 0, we can conclude that (x - 2) is a factor.