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If alpha is a complex constant such that...

If `alpha` is a complex constant such that `a z^2+z+ alpha=0` has a ral root, then `alpha+ alpha=1` `alpha+ alpha=0` `alpha+ alpha=-1` the absolute value of the real root is 1

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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