Scrieti E(x)=9x^3-18x^2-4x+8 in factori.

Răspuns :

E(x) = 9x^3-18x^2-4x+8 = 9x^2(x-2) - 4(x-2) = (x-2)(9x^2-4) = (x-2)(3x-2)(3x+2)