Let \[\lambda \in \mathbf{R}\] If the origin and the non-real roots of \[2{{z}^{2}}+2z+\lambda =0\] form the three vertices of an equilateral triangle in the arg and plane. Then \[\lambda \] is

Let \[\lambda \in \mathbf{R}\] If the origin and the non-real roots of

1.	Let \[\lambda \in \mathbf{R}\] If the origin and the non-real roots of \[2{{z}^{2}}+2z+\lambda =0\] form the three vertices of an equilateral triangle in the arg and plane. Then \[\lambda \] is
A.	1
B.	\[\frac{2}{3}\]
C.	2
D.	\[-1\]
Answer» C. 2

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Let \[\lambda \in \mathbf{R}\] If the origin and the non-real roots of \[2{{z}^{2}}+2z+\lambda =0\] form the three vertices of an equilateral triangle in the arg and plane. Then \[\lambda \] is

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