化简a-1分之a平方 -a -1

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化简a-1分之a平方-a-1化简a-1分之a平方-a-1化简a-1分之a平方-a-1a²/(a-1)-a-1=a²/(a-1)-(a+1)=a²/(a-1)-(a+1)(

化简a-1分之a平方 -a -1
化简a-1分之a平方 -a -1

化简a-1分之a平方 -a -1
a²/(a-1)-a-1
=a²/(a-1)-(a+1)
=a²/(a-1)-(a+1)(a-1)/(a-1)
=[a²-(a+1)(a-1)]/(a-1)
=[a²-(a²-1)]/(a-1)
=(a²-a²+1)/(a-1)
=1/(a-1)