2x^2-1-(x^2-x+3)-(x^2+x-4) 用分离系数法写过程

问题描述:

2x^2-1-(x^2-x+3)-(x^2+x-4) 用分离系数法写过程

2x^2-1-(x^2-x+3)-(x^2+x-4)
=2x^2-1-x^2+x-3-x^2-x+4
=(2-1-1)x^2+(1-1)x+(-1-3+4)
=0+0+0
=0