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If b^(2)ge4ac for the equation ax^(4)+bx...

If `b^(2)ge4ac` for the equation `ax^(4)+bx^(2)+c=0` then all the roots of the equation will be real if

A

`b gt 0, a lt 0, c lt 0`

B

`b gt 0, a gt 0, c gt 0`

C

`b lt 0, a gt0, c gt 0`

D

` b gt 0, a lt 0, c lt 0`

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The correct Answer is:
C, D
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AAKASH INSTITUTE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-Assignment (Section -C) (objective Type Questions ( more thena one options are correct )
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  19. If the difference between the roots of the equation x^2+a x+1=0 is les...

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