[x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y
问题描述:
[x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y
答
[x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y
=(x³y²-x²y-x²y+x³y²)÷3x²y
=(2x³y²-2x²y)÷3x²y
=2xy/3-2/3