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If the equation x^(2)-cx+d=0 has roots e...

If the equation `x^(2)-cx+d=0` has roots equal to the fourth powers of the roots of `x^(2)+ax+b=0`, where `a^(2)gt4b`, then the roots of `x^(2)-4bx+2b^(2)-c=0` will be

A

both real

B

both negative

C

both positive

D

one positive and one negative

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The correct Answer is:
A, D
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