Question

СРОЧНО, ПОМОГИТЕ!!! ОЧЕНЬ НУЖНО!!! ​

Answer 1

$\dfrac{4xy}{y^2-x^2}:\bigg(\dfrac1{y^2-x^2}+\dfrac1{x^2+2xy+y^2}\bigg)=$

$=\dfrac{4xy}{(y+x)(y-x)}:\bigg(\dfrac1{(y+x)(y-x)}+\dfrac1{(x+y)^2}\bigg)=$

$=\dfrac{4xy}{(y+x)(y-x)}:\bigg(\dfrac{x+y+y-x}{(y-x)(y+x)^2}\bigg)=\dfrac{4xy}{(y+x)(y-x)}\cdot\dfrac{(y-x)(y+x)^2}{2y}=$

$=2x(y+x)=2xy+2x^2$