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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2009
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Q)
If the roots of the equation $bx^2 + cx + a = 0$ be imaginary, then for all real values of $x$, the expression $3b^2x^2 + 6bcx+2c^2$ is
( A ) greater than 4ab
( B ) less than -4ab
( C ) less than 4ab
( D ) greater than -4ab
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