Помогите срочно...........-----

Question

Помогите срочно...........-----

---

Answer 1

(х-2)^2=x^2-2*x*2+2^2=x^2-4x+4
(2x+3y)^2=2^2x^2+2*2x*3y+3^2y^2=4x^2+12xy+9y^2
(a+2b)(a-2b)=a^2-2ab+2ab-2^2b^2=a^2-4b^2
(a+3)^3=a^3+3a^2*3+3a*3^2+3^3=a^3+9a^2+27a+27
8-x^3=8-x*x*x

Answer 2

(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