5a^2b(x-y)^2-30ab^2(y-x)^2
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5a^2b(x-y)^2-30ab^2(y-x)^25a^2b(x-y)^2-30ab^2(y-x)^25a^2b(x-y)^2-30ab^2(y-x)^25a^2b(x-y)^2-30ab^2(y-
5a^2b(x-y)^2-30ab^2(y-x)^2
5a^2b(x-y)^2-30ab^2(y-x)^2
5a^2b(x-y)^2-30ab^2(y-x)^2
5a^2b(x-y)^2-30ab^2(y-x)^2
=5a^2b(x-y)^2-30ab^2(x-y)^2
=5ab(x-y)^2*(a-6b)
5a^2b(x-y)^2-30ab^2(y-x)^2
5a^2 b(x-y)^3-30ab^2(y-x)^2
5a^2b(x-y)^3-30ab^2(y-x)^2
a^2b(x-y)-ab(y-x)
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5a^2b(x-y)-14ab^2(y-x)^25a^2b(x-y)-30ab^2(y-x)^2上面的错了 是这个!
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