Question

(x-2)(x^2+2x+4)-2(x-1)(x+1)

Answer 1

(x-2)(x+2)-(2x-1)(2x+1)

x mũ 2 -2 mũ 2

Answer 2

Answer 3

=x^3-8-2(x^2-1)

=x^3-8-2x^2+2

=x^3-2x^2-6