Question

Решите $\frac{xy+y^2}{x} \cdot \frac{y}{(x+y)} : xy$

Answer 1

$\dfrac{xy+y^2}{x} \cdot \dfrac{y}{(x+y)} : xy= \dfrac{y(x+y)}{x} \cdot \dfrac{y}{(x+y)} \cdot \dfrac{1}{xy}= \dfrac{y(x+y)y}{x(x+y)xy} =\dfrac{y}{x^2}$