约分2(x-y)^3/(y-x)

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约分2(x-y)^3/(y-x)约分2(x-y)^3/(y-x)约分2(x-y)^3/(y-x)2(x-y)^3/(y-x)=-2(x-y)^3/(x-y)=-2(x-y)²

约分2(x-y)^3/(y-x)
约分2(x-y)^3/(y-x)

约分2(x-y)^3/(y-x)
2(x-y)^3/(y-x)
=-2(x-y)^3/(x-y)
=-2(x-y)²