if a方+b方>0,then the equation ax+b=0 for x has ()A、only one root(根) B、no root C、infinite roots(无数根) D、only one root or no root

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if a方+b方>0,then the equation ax+b=0 for x has ()A、only one root(根) B、no root C、infinite roots(无数根) D、only one root or no root

if a方+b方>0,then the equation ax+b=0 for x has ()A、only one root(根) B、no root C、infinite roots(无数根) D、only one root or no root
if a方+b方>0,then the equation ax+b=0 for x has ()
A、only one root(根) B、no root C、infinite roots(无数根) D、only one root or no root

if a方+b方>0,then the equation ax+b=0 for x has ()A、only one root(根) B、no root C、infinite roots(无数根) D、only one root or no root
a方+b方>0
ax+b=0
a和b至少有一个不等于0
x=-b/a
(1)a=0,无解
(2)a≠0,x=-b/a
D、only one root or no root

我觉得是C 不止唯一的解,其他两位你们都错了

答:
假如a²+b²>0
方程ax+b=0根的情况
因为:a²+b²>0
说明a和b不同时为0
1)当a=0时,b≠0
方程变为0+b=0,矛盾,方程无解
2)当a≠0时,x=-b/a,有唯一的解
所以:选择D