Question

7 номер помогите пожалуйста

Answer 1

$= (frac{1}{(x-y)^2}- frac{1}{(x-y)(x+y)})* frac{xy+x^2}{2y^2}= frac{(x+y)-(x-y)}{(x-y)^2(x+y)}* frac{xy+x^2}{2y^2}= frac{2y}{(x-y)^2(x+y)}* \ frac{x(y+x)}{2y^2}= frac{x}{2y(x-y)^2}$