作业帮（a-2/a2+2a-a-1/a2+4a+4)/a-4/a+2,其中a满足a2+2a=1
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 15:42:12
（a-2/a2+2a-a-1/a2+4a+4)/a-4/a+2,其中a满足a2+2a=1
（a-2/a2+2a-a-1/a2+4a+4)/a-4/a+2,其中a满足a2+2a=1
（a-2/a2+2a-a-1/a2+4a+4)/a-4/a+2,其中a满足a2+2a=1
(a-2)/(a+2a)-(a-1)/(a+4a+4)-(a-4)/(a+2).[猜着修改的] =(a-2)/(a+2a)-(a-1)/(a+4a+4)-(a-4)/(a+2) =(a-2)/a(a+2)-(a-1)/(a+2)-(a-4)/(a+2) =(a-4)/a(a+2)-a(a-1)/a(a+2)-(a-4)/(a+2) =(a-4)/a(a+2)-(a-4)/(a+2) =(a-4)[1/a(a+2)-(a+2a)/a(a+2)] =(a-4)[1/a(a+2)-1/a(a+2)] =(a-4)×0 =0
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