A value of b for which the equations \[{{x}^{2}}+bx-1=0\] \[{{x}^{2}}+x+b=0\] have one root in common is

A value of b for which the equations \[{{x}^{2}}+bx-1=0\] \[{{x}^{2}}+

1.	A value of b for which the equations \[{{x}^{2}}+bx-1=0\] \[{{x}^{2}}+x+b=0\] have one root in common is
A.	\[-\sqrt{2}\]
B.	\[-i\sqrt{3}\]
C.	\[i\sqrt{5}\]
D.	\[\sqrt{2}\]
Answer» C. \[i\sqrt{5}\]

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A value of b for which the equations \[{{x}^{2}}+bx-1=0\] \[{{x}^{2}}+x+b=0\] have one root in common is

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