化简:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)

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化简:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)
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化简:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)
化简:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)

化简:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)
:(x平方+x+1)/(x三次方-1)-(2x-2)/(x平方-2x+1)
=(x²+x+1)/(x-1)(x²+x+1)-2(x-1)/(x-1)²
=1/(x-1)-2/(x-1)
=-1/(x-1)

原式=(x²+x+1)/(x-1)(x²+x+1)-2(x-1)/(x-1)²
=1/(x-1)-2/(x-1)
=-1/(x-1)