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Let a,b and c be real numbers such that...

Let `a,b and c` be real numbers such that `4a+2b+c=0 and ab gt 0`.Then the equation `ax^2+bx+c=0` has (A) real roots (B) Imaginary roots (C) exactly one root (D) roots of same sign

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CENGAGE PUBLICATION-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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