计算:[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y

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:

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[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
 
 
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