1、值为0.
即x-2=0且2x+3≠0,解得x=2.
2、值为正.
即x-2＞0,2x+3＞0,或者x-2＜0,2x+3＜0,解得x＞2或x＜-1.5
3、值为负.
即x-2＞0,2x+3＜0,或者x-2＜0,2x+3＞0,解得-1.5＜x＜2
4、值为1.
即x-2=2x+3且2x+3≠0,解得x=-5