a/a+2-1/a-1÷a+2/a²-2a+1
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/28 10:12:37
a/a+2-1/a-1÷a+2/a²-2a+1a/a+2-1/a-1÷a+2/a²-2a+1a/a+2-1/a-1÷a+2/a²-2a+1a/a+2-1/a-1÷a+2/
a/a+2-1/a-1÷a+2/a²-2a+1
a/a+2-1/a-1÷a+2/a²-2a+1
a/a+2-1/a-1÷a+2/a²-2a+1
a/a+2-1/a-1÷a+2/a²-2a+1
=a(a-1)/(a²-2a+1)-(a+2)/(a²-2a+1)÷a+2/a²-2a+1
=a²-a-a-2/a+2
=a²-2/a+2