Question

Вариант 1, задание 3 под Б
Даю 76 баллов

Answer 1

$Big(dfrac{1}{4x^2}-dfrac{1}{xy}+dfrac{1}{y^2}Big)cdot Big(dfrac{1}{2x-y}-dfrac{1}{y-2x}Big)-dfrac{1}{xy^2}=\\\=dfrac{y^2-4xy+4x^2}{4x^2y^2}cdot dfrac{-1-1}{y-2x}=dfrac{(y-2x)^2}{4x^2y^2}cdot dfrac{-2}{y-2x}=dfrac{-2(y-2x)}{4x^2y^2}=dfrac{2x-y}{2x^2y^2}$