0 votes 0 votes 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 $4$ $-4$ $-\frac{9}{2}$ $\frac{9}{2}$ Quantitative Aptitude cat2022-set2 quantitative-aptitude + – admin asked Feb 2, 2023 • edited Dec 29, 2023 by makhdoom ghaya admin 4.5k points 264 views answer comment Share See all 0 reply Please log in or register to add a comment.