约分2(x-y)^3/(y-x)
问题描述:
约分2(x-y)^3/(y-x)
答
2(x-y)^3/(y-x)
=-2(x-y)^3/(x-y)
=-2(x-y)²
约分2(x-y)^3/(y-x)
2(x-y)^3/(y-x)
=-2(x-y)^3/(x-y)
=-2(x-y)²