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If alphaa n dbeta are the roots of x^2+p...

If `alphaa n dbeta` are the roots of `x^2+p x+q=0a n dalpha^4,beta^4` are the roots of `x^2-r x+s=0` , then the equation `x^2-4q x+2q^2-r=0` has always. one positive and one negative root two positive roots two negative roots cannot say anything

A

two real roots

B

two negative roots

C

two positive roots

D

one positive and one negative roots.

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A DAS GUPTA-Equations, Inequation and Expressions-Exercise
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