if $x=-9$ is a root of $\begin{vmatrix}x & 3 & 7\\2 & x & 2\\7 & 6 & x\end{vmatrix}=0$, then other roots are

Question

$\begin{array}{1 1} -7,-2 \\ 7,-2 \\ -7,2 \\ 7,2 \end{array}$