问题描述: 计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y 1个回答 分类:数学 2014-10-28 问题解答: 我来补答 [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y=(x^3y^2-x^2y-x^2y+x^3y^2)/3x^2y=(2x^3y^2-2x^2y)/3x^2y=2/3xy-2/3 展开全文阅读