x-y-1分之x²-2xy+y²-1 化简

来源：学生作业帮助网编辑：作业帮时间：2024/05/02 18:18:15

x-y-1分之x²-2xy+y²-1 化简
x-y-1分之x²-2xy+y²-1 化简

x-y-1分之x²-2xy+y²-1 化简
（x²-2xy+y²-1)/(x-y-1)
=[(x-y)²-1]/(x-y-1)
=(x-y+1)(x-y-1)/(x-y-1)
=x-y+1

分子为：
x²-2xy+y²-1
=(x-y)²-1
=(x-y+1)(x-y-1)
所以原式=(x-y+1)(x-y-1)/(x-y-1)=x-y+1