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3(y-x)^2+5(x-y)^2怎么解
人气:315 ℃ 时间:2020-05-22 16:58:26
解答
3(y-x)^2+5(x-y)^2
=3(x-y)^2+5(x-y)^2
=(3+5)(x-y)^2
=8(x-y)^2
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