(x-2)^2-(x-1)/(x-2)+(x+1)/(x^2-x-2)计算

问题描述:

(x-2)^2-(x-1)/(x-2)+(x+1)/(x^2-x-2)计算

原式=(x-2)^2-(x-1)/(x-2)+1/(x-2)=(x-2)^2-1=(x-1)(x-3)