化简:(x2-2x+1)/(x2+1)除以(x-1)/(x2+x)-x
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化简:(x2-2x+1)/(x2+1)除以(x-1)/(x2+x)-x
化简:(x2-2x+1)/(x2+1)除以(x-1)/(x2+x)-x
化简:(x2-2x+1)/(x2+1)除以(x-1)/(x2+x)-x
错了
x²+1是x²-1
原式=(x-1)²/(x+1)(x-1)*x(x+1)/(x-1)-x
=(x-1)/(x+1)*x(x+1)/(x-1)-x
=x-x
=0
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