作业帮计算：（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/14 02:58:34
计算：（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2
计算：（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2
计算：（a-1）/（a+2）•[（a²+4a+4）/（a-1）]-2
（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