Question

упростите выражение
$( \frac{4y}{2-y}-y): \frac{y+2}{y-2}$

Answer 1

(4y-2y+y^2/2-y): y+2/ y-2 =
(2y+y^2/2-y )*(y-2)/(y+2)=
-(y (2+y)*(2-y)/ ( 2-y)*(2+y))= - y