a²(x-y)²-2a(x-y)²-y(y-x)3次 分解因式
问题描述:
a²(x-y)²-2a(x-y)²-y(y-x)3次 分解因式
答
原式=a²(x-y)²-2a(x-y)²+y(x-y)³
=(x-y)²[a²-2a+y(x-y)]
=(x-y)²(a²-2a+xy-y²)