因式分解:x(x+y)-y(x+y)
问题描述：
因式分解:x(x+y)-y(x+y)
答
x(x+y)-y(x+y)
=(x+y)(x-y)
因式分解:x(x+y)-y(x+y)
x(x+y)-y(x+y)
=(x+y)(x-y)