Решите пожалуйста. (x-6)²= (7x+3y)²= (3-2y)²= (x³-4x)²= 81x²-(9x2y)²=

Question

Решите пожалуйста.
(x-6)²=
(7x+3y)²=
(3-2y)²=
(x³-4x)²=
81x²-(9x2y)²=

Answer 1

(x-6)^2=x^2-12x+36

(7x+3y)^2=49x^2+42xy+9y^2

(3-2y)^2=9-12y+4y^2

(x^3-4x)^2=x^6-8x^4+16x^2

81x^2-(18xy)^2=(81x^2-18xy)(81x^2+18xy)