Question

Срочно $\frac{x^2}{x^2-y}$ умножить на $\frac{y-x}{x}$

Answer 1

$\frac{x {}^{2} }{x {}^{2} - y} \times \frac{y - x}{x} = \\ \frac{xy - x {}^{2} }{x {}^{2} - y }$