x=0
则 0+0+c=0
c=0
一元二次方程则a≠0
选D
一元二次方程ax2+bx+c=0有一个根为0的条件是（ ）.
一元二次方程ax2+bx+c=0有一个根为0的条件是（ ）.
A. a=0
B. a不等于0
C. b=0或a不等于0
D. c=0或a不等于0
A. a=0
B. a不等于0
C. b=0或a不等于0
D. c=0或a不等于0
数学人气：401 ℃时间：2019-11-18 07:36:41
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