← CAT 2022 Slot 2 QA

CAT 2022 Slot 2 QA · Question 9

Let $r$ and $c$ be real numbers. If $r$ and $- r$ are roots of $5 x^{3} + c x^{2} - 10 x + 9 = 0$ , then $c$ equals

A.
$- \frac{9}{2}$
B.
$\frac{9}{2}$
C.
$- 4$
D.
$4$

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