化简下列式子,求详细过程
2017-01-23
展开全部
5
(a*a-a)/(a*a-1)
=a*(a-1)/(a-1)*(a+1)
=a/(a+1)
a/(a-1)/a/(a+1)
=a/(a-1)*(a+1)/a
=(a+1)/(a-1)
(a+1)/(a-1)-1/(a-1)
=(a+1-1)/(a-1)
=a/(a-1)
原式=a/(a-1)
(a*a-a)/(a*a-1)
=a*(a-1)/(a-1)*(a+1)
=a/(a+1)
a/(a-1)/a/(a+1)
=a/(a-1)*(a+1)/a
=(a+1)/(a-1)
(a+1)/(a-1)-1/(a-1)
=(a+1-1)/(a-1)
=a/(a-1)
原式=a/(a-1)
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