3(x-y)²*(y-x)²*2(x-y)
=6(x-y)^(2+2+1)
=6(x-y)^5需要再详细一点的 过程3(x-y)²*(y-x)²*2(x-y)=3(x-y)²×[-(x-y)]²×2(x-y)=3×2(x-y)²×(x-y)²×(x-y)=6(x-y)^(2+2+1)=6(x-y)^5