化简 (x+2)-(x-2分之x^2+2x)

问题描述:

化简 (x+2)-(x-2分之x^2+2x)

(x+2)-(x-2分之x^2+2x)
=x+2 - x
= 2

原式=[(x+2)(x-2)-(x²+2x)]/(x-2)
=(x²-4-x²-2x)/(x-2)
=-(2x+4)/(x-2)