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5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简
如何化简,
人气:425 ℃ 时间:2019-12-08 12:21:08
解答
5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2
=5xy^2-3xy^2+(4xy^2-2x^y)+x^2y-xy^2
=5xy^2-3xy^2+4xy^2-2x^y+x^2y-xy^2
=5xy^2-x^2y
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