一元二次方程 -2x-1=0的解是_刷题宝

题干

一元二次方程

-2x-1=0的解是（　）

A： = =1

B： =1+ ， =-1-

C： =1+ ， =1-

D： =-1+ ， =-1-

上一题下一题 0.0难度选择题更新时间:2017-04-13 12:48:23

答案(点此获取答案解析）

C

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