(x平方-4x+4)/(1-0.5x)计算

问题描述:

(x平方-4x+4)/(1-0.5x)计算
因式分解的应用

(x^2-4x+4)/(1-0.5x) =(x^2-4x+4)/(1-1/2x) =(x^2-4x+4)/[(2-x)/2] =(x-2)^2/[(2-x)/2] =(x-2)^2*[2/(2-x)] =(x-2)^2*[(-2)/(x-2)] =-2(x-2)^2