如果不等于零的数b是方程:x2+cx+b=0的根,则b+c=( ) A.-1 发布时间:2017-04-21 20:33 │ 来源:www.tikuol.com 题型:选择题 问题: 如果不等于零的数b是方程:x2+cx+b=0的根,则b+c=( )A.-1B.1C.-2D.2
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