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2a(x-y)^2+4a^2(y-x)^3
人气:246 ℃ 时间:2020-05-10 06:41:07
解答
2a(x-y)^2+4a^2(y-x)^3
=2a(y-x)^2+4a^2(y-x)^3
=2a(x-y)^2(1+2a(y-x))
=2a(x-y)^2*(2ay-2ax+1)
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