Question

напишите подробное решение пж

Answer 1

$1)\frac{5x+10}{x-1}* \frac{x^{2}-1} {x^{2}-4}= \frac{5(x+2)}{x-1}* \frac{(x-1)(x+1)}{(x+2)(x-2)}= \frac{5*(x+1)}{x-2}= \frac{5x+5}{x-2}$

$2)\frac{y+c}{c}*( \frac{c}{y}- \frac{c}{y+c})= \frac{y+c}{c}* \frac{cy+c^{2}-cy} {y(y+c)}= \frac{y+c}{c}* \frac{c^{2}} {y(y+c)}= \frac{c}{y}$