[(x-2)的三次方-(x-1)的平方+1]/(x-2)＝｛（x-2）^3-x^2+2x-1+1｝/(x-2)=(x-2)^3/(x-2)-(x^2-2x)/(x-2)=(x-2)^2-x=x^2-4x+4-x=x^2-5x+4=x^2-5x+2000-1996=0-1996=-1996
X无实数解 题目没写错吧？？
