（x-y+4xy除以x-y）（x+y-4xy除以x+y）的解

来源：学生作业帮助网编辑：作业帮时间：2024/05/14 05:05:54

原式=[(x-y)²+4xy]/(x-y)乘[(x+y)²-4xy]/(x+y)
=(x+y)²/(x-y)乘(x-y)²/(x+y)
=(x+y)(x-y)
=x²-y²