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-2y^3+(3xy^2-x^2y)-2(xy^2-y^3)去括号合并同类项
人气:141 ℃ 时间:2020-06-19 18:20:09
解答
-2y^3+(3xy^2-x^2y)-2(xy^2-y^3)
=-2y^3+3xy^2-x^2y-2xy^2+2y^3
=xy^2-x^2y
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