Question

Помогите сократить дробь.
$\frac{ x^{2} -y ^{2} }{(x+y) ^{2} }$

Answer 1

(x²-y²)/(x+y)²=(x-y)(x+y)/(x+y)²=(x-y)/(x+y)

Answer 2

(x2-y2):(x+y)2=(x-y)(x+y):(x+y)2=(x-y):(x+y)