计算a-1/a²-6a+9÷a²-1/a²-9

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/31 12:13:12

计算a-1/a²-6a+9÷a²-1/a²-9

a-1/a²-6a+9÷a²-1/a²-9
=a-1/(a-3)²÷(a+1)(a-1)/(a+3)(a-3)
=(a+3)/(a+1)(a-3)