1.化简（x^3-x^2)/(x^2-x)-(1-x^2)/(x+1)

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1.化简（x^3-x^2)/(x^2-x)-(1-x^2)/(x+1)

1.化简（x^3-x^2)/(x^2-x)-(1-x^2)/(x+1)
1.化简（x^3-x^2)/(x^2-x)-(1-x^2)/(x+1)

1.化简（x^3-x^2)/(x^2-x)-(1-x^2)/(x+1)
(x^3-x^2)/(x^2-x)-(1-X^2)/(X+1) =x^2/(x-1)/x(x-1)+(x^2-1)/(x+1)=x+(x+1)(x-1)/(x+1)=x+x-1=2x-1

x^2*(x-1)/(x*(x-1))-(1-x)=x-1+x=2*x-1

＝x^2（x-1）/x（x－1）+（x+1）（x-1）/（x+1）＝x+x-1＝2x-1