Question

Алгебра! Срочно! Решите!

Answer 1

$(x-y)*(x+y)+(x+y)^{2} \\ (x+y)*(x-y+x+y) \\(x+y)*2x \\ 2x*(x+y)$

Answer 2

$(x-y)(x+y)+(x+y)^2=(x-y)(x+y)+(x+y)(x+y) = \\ = (x+y)(x-y+x+y) = (x+y) \cdot 2x = 2x^2+2xy$