x(x+y)(x-y)-x(x+y)的平方怎么提公因式
问题描述:
x(x+y)(x-y)-x(x+y)的平方怎么提公因式
答
x(x+y)(x-y)-x(x+y)²
=x(x+y)[(x-y)-(x+y)]
=x(x+y)(x-y-x-y)
=-2xy(x+y)