[x(-4x+3)+(x+2)(x-2)x]除以(-x)

问题描述:

[x(-4x+3)+(x+2)(x-2)x]除以(-x)

[x(-4x+3)+(x+2)(x-2)x] / (-x) 上下约分去掉x
= - [(-4x+3)+(x+2)(x-2)]
= - [-4x+3+x^2-4x+4]
= - [x^2-8x+7]
= - x^2+8x-7