计算：（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2

来源：学生作业学帮网编辑：学帮网时间：2024/06/25 05:20:16

（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2
=（a-1）/（a+2）•[(a+2)²/(a-1)]-2
=a+2-2
=a

（a- 1）/（a+2）•[（a²+4a+4）/（a-1）]-2
=（a+2）-2
=a