Question

Помогите срочно...........-----

Answer 1

(x-2)^2=x^2-4
(2x+3y)^2=4x^2+9y^2
(a+2b)(a-2b)=a^2-2ab+2ab+4b^2=a^2+4b^2
(a+3)^3=a^3+27
8-x^3=2^3-x^3