化简（a²/a+1－a+1）÷a/a²－1

来源：学生作业学帮网 编辑：学帮网 时间：2024/06/06 22:53:49

化简（a²/a+1－a+1）÷a/a²－1

原式=(a²/a+1-1/a+1)a²/a-1
=(a²-1/a+1)a-1
=[(a+1)(a-1)/a+1]a-1
=(a-1)a-1
=a²-a-1