赞 kcc20031201 幼苗
共回答了18个问题采纳率：94.4% 举报
5m(x-y)²+10n(y-x)³
=5m(x-y)²-10n(x-y)³
=5(x-y)²[m-2n(x-y)]
=5(x-y)²(m-2nx+2ny)
=-5(x-y)²(2nx-2ny-m)
=5m(x-y)²-10n(x-y)³
=5(x-y)²[m-2n(x-y)]
=5(x-y)²(m-2nx+2ny)
=-5(x-y)²(2nx-2ny-m)
1年前
6
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你能帮帮他们吗