计算:(x-1)(x^2-4X+3)-x(x^2-5X+2)有过程
问题描述:
计算:(x-1)(x^2-4X+3)-x(x^2-5X+2)有过程
答
(x-1)(x^2-4x+3)-x(x^2-5x+2)=x(x^2-4x+3)-(x^2-4x+3)-x(x^2-5x+2)=x(x^2-5x+2+x+1)-(x^2-4x+3)-x(x^2-5x+2)=x(x^2-5x+2)+x(x+1)-(x^2-4x+3)-x(x^2-5x+2)=x(x+1)-(x^2-4x+3)=x^2+x-x^2+4x-3=x^2-x^2+x+4x-3=5x-3