a³(x-y)-3a²b(y-x)因式分解为
问题描述:
a³(x-y)-3a²b(y-x)因式分解为
答
a³(x-y)-3a²b(y-x)
=a³(x-y)+3a²b(x-y)
=a²(x-y)+(a+3b)