问题 解答题

计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.

答案

[x(x2y2-xy)-y(x2+x3y)]÷3x2y,

=(x3y2-x2y-x2y-x3y2)÷3x2y,

=-2x2y÷3x2y,

=-

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