Question

4) ×-y : ײ-y² = ?
____ ____
×y 3×y

Answer 1

Ответ:

$\displaystyle \frac{3}{x+y}$

Объяснение:

$\displaystyle \frac{x-y}{xy}:\frac{x^2-y^2}{3xy}=\frac{x-y}{xy}:\frac{(x-y)(x+y)}{3xy}=\\\\\\\\\frac{x-y}{xy}\cdot \frac{3xy}{(x-y)(x+y)}=\frac{3}{x+y}$