已知x-y=3,xy=10,则x²y-xy²=
问题描述：
已知x-y=3,xy=10,则x²y-xy²=
答
x^2y-xy^2
=xy(x-y)
=30
答
x²y-xy²
=xy(x-y)
代入后，得：
原式：=30
答
x*xy-xy*y= xy*(x-y)=30
答
原式=xy(x-y)=30.
答
x²y-xy²
=xy(x-y)
=10×3
=30
答
x²y-xy²=(x-y)xy=30