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;化简求值,{【(a方+2a)分之(a-2)】-【(a方+4a+4)分之(a-1)】}除以(a+2)分之(a-4),
其中a满足:a方+2a-1=0
人气:172 ℃ 时间:2019-08-18 16:46:43
解答
((a-2)/(a²+2a)-(a-1)/(a²+4a+4))/(a-4/a+2)=((a-2)/(a²+2a)-(a-1)/(a+2)²)*(a+2)/(a-4)=((a-2)/a-(a-1)/(a+2))/(a-4)=((a²-4)-(a²-a))/a(a+2)...
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