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The equations x^2+x+a=0 and x^2+ax+1=0 h...

The equations `x^2+x+a=0` and `x^2+ax+1=0` have a common real root

A

for no value of a

B

for exactly one value of a

C

for exactly two value of a

D

for exactly three value of a

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The correct Answer is:
B
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