化解(1-2/a+1)^2/(a-1/a+1)有过程

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化解(1-2/a+1)^2/(a-1/a+1)有过程化解(1-2/a+1)^2/(a-1/a+1)有过程化解(1-2/a+1)^2/(a-1/a+1)有过程原式=【(1-2/(a+1))^2】/【(a

化解(1-2/a+1)^2/(a-1/a+1)有过程
化解(1-2/a+1)^2/(a-1/a+1)有过程

化解(1-2/a+1)^2/(a-1/a+1)有过程
原式=【(1-2/(a+1))^2】/【(a-1)/(a+1)】
=【(a-1)/(a+1)】^2/【(a-1)/(a+1)】
=(a-1)/(a+1)