(A的平方+4/a的平方-4a+4-1/a-2)÷a+1/a+2怎么算?

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/30 05:51:18

(A的平方+4/a的平方-4a+4-1/a-2)÷a+1/a+2怎么算?

=[(a²+4)/(a-2)²-(a-2)/(a-2)²]×(a+2)/(a+1)
=[(a²-a+6)/(a-2)²]×(a+2)/(a+1)
=(a²-a+6)(a+2)/[(a-2)²(a+1)]

=(a²-a+6)(a+2)/[(a-2)²(a+1)]