(x^2-xy)y÷y-x/xy怎么做?
问题描述：
(x^2-xy)y÷y-x/xy怎么做?
答
=xy(x-y)×[-xy/(x-y)]
=-(xy)²
=-x²y²
(x^2-xy)y÷y-x/xy怎么做?
=xy(x-y)×[-xy/(x-y)]
=-(xy)²
=-x²y²