3.方程x(x+1)(x-2)=0的根为( ) A.-1,2,0 B.1,-2 C.0,-1 D.0,1,-2

问题描述:

3.方程x(x+1)(x-2)=0的根为( ) A.-1,2,0 B.1,-2 C.0,-1 D.0,1,-2

令三项分别等于0,得x=0,x=-1,x=2,因此答案选A

选A 0.-1.2