bantu jawab dong, x²-y²/y²+2xy+y²=

Berdasarkan [tex](x+y)^2=x^2+2xy+y^2[/tex] dan [tex]x^2 - y^2=(x+y)(x-y)[/tex]
[tex] =\frac{x^2 - y^2}{x^2+2xy+y^2} \\ = \frac{(x+y)(x-y)}{(x+y)^2} \\ = \frac{x-y}{x+y}[/tex]