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If alpha and beta are the roots of the e...

If `alpha` and `beta` are the roots of the equation `x^2+ax+b=0` and `alpha^4` and `beta^4` are the roots of the equation `x^2-px+q=0` then the roots of `x^2-4bx+2b^2-p=0` are always

A

two real - roots

B

two positive roots

C

two negative roots

D

one positive and one negative root

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The correct Answer is:
A
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