下列方程中没有实数根的是

题干

下列方程中没有实数根的是（）

A： $x^{2} + x - 1 = 0$ ；

B： $x^{2} + x + 1 = 0$ ；

C： $x^{2} - 1 = 0$ ；

D： $x^{2} + x = 0$ ．

上一题下一题 0.0难度选择题更新时间:2019-11-19 11:14:45

B

A

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