I need help solving this problem

Question

(x-y)^2/(x^2-y^2)

Answer 1

The rational expression (x - y)²/(x² - y²)

Apply the formula (a² - b²) = (a - b)(a + b)

a = x, b = y

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

= (x - y)/(x + y)