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If alpha is a complex constant such tha...

If `alpha` is a complex constant such that `alpha^2+z+bar alpha=0` has a real root then

A

`alpha+bar(alpha)=1`

B

`alpha+bar(alpha)=0`

C

`alpha+bar(alpha)=-1`

D

the absolute value of real root is 1

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The correct Answer is:
A, C, D
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