(x-y)^3×（x-y)^2×(y-x)
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(x-y)^3×（x-y)^2×(y-x)(x-y)^3×（x-y)^2×(y-x)(x-y)^3×（x-y)^2×(y-x)(x-y)^3×（x-y)^2×(y-x)=(x-y)^3×（x-y)^2
(x-y)^3×（x-y)^2×(y-x)
(x-y)^3×（x-y)^2×(y-x)
(x-y)^3×（x-y)^2×(y-x)
(x-y)^3×（x-y)^2×(y-x)
=(x-y)^3×（x-y)^2×（-1）（x-y）
=（x-y）【2×3×（-1）】
=-(x-y)^6
过程挺完美的,不枉我做了5年的语文教师.
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