Ответ: [tex] (\frac{y}{y-5} -2y): \frac{11-2y}{y-5} = \frac{y — 2y(y-5)}{y-5} : \frac{11-2y}{y-5}= \\ \\
= \frac{y-2y^2+10y}{y-5} * \frac{y-5}{11-2y} = \frac{11y -2y^2}{y-5} * \frac{y-5}{11-2y}= \\ \\
= \frac{y(11-2y)(y-5)}{(y-5)(11-2y)} = \frac{y}{1} = y[/tex]
Ответ: 1)y/(y-5) -2y=(y-2y²+10y)/(y-5)=(11y-2y²)/(y-5)2)y(11-2y)/(y-5) *(y-5)/(11-2y)=y
Источник znanija.site