(x-(x+1分之2x))除以x^2-1分之x^2-2x+1

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(x-(x+1分之2x))除以x^2-1分之x^2-2x+1(x-(x+1分之2x))除以x^2-1分之x^2-2x+1(x-(x+1分之2x))除以x^2-1分之x^2-2x+1原式=(x²

(x-(x+1分之2x))除以x^2-1分之x^2-2x+1
(x-(x+1分之2x))除以x^2-1分之x^2-2x+1

(x-(x+1分之2x))除以x^2-1分之x^2-2x+1
原式=(x²+x-2x)/(x+1)÷[(x-1)²/(x+1)(x-1)]
=(x²-x)/(x+1)÷[(x-1)/(x+1)]
=x(x-1)/(x+1)*(x+1)/(x-1)
=x