3(x-y)的平方*(y-x)的平方*2(x-y)等于

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3(x-y)的平方*(y-x)的平方*2(x-y)等于3(x-y)的平方*(y-x)的平方*2(x-y)等于3(x-y)的平方*(y-x)的平方*2(x-y)等于3(x-y)²*(y-x)&

3(x-y)的平方*(y-x)的平方*2(x-y)等于
3(x-y)的平方*(y-x)的平方*2(x-y)等于

3(x-y)的平方*(y-x)的平方*2(x-y)等于
3(x-y)²*(y-x)²*2(x-y)
=6(x-y)^(2+2+1)
=6(x-y)^5

(y-x)的平方就等于(x-y)的平方, 懂了吧

3(x-y)²·(y-x)²·2(x-y)
=3(x-y)²·(x-y)²·2(x-y)
=6(x-y)⁵