Question

(x+2y)^2
(2x+3y)^2
(3x-2y)^2

Answer 1

(x+2y)(x+2y)

x²+2xy+2xy+2y²

x²+4xy+2y²

(2x+3y)(2x+3y)

4x²+6xy+6xy+9y²

4x²+12xy+9y²