Evaluate Each Determinant $\operatorname{det}\left[\begin{array}{rr}6 & 3 \\ -8 & 2\end{array}\right]$ (B) $\operatorname{det}\left[\begin{array}{rrr}3 & 1 & -2 \\ 1 & -4 & 3 \\ 7 & 11 & -12\end{array}\right]$

Short Answer

Evaluate each determinant.
(a) $\operatorname{det}\left[\begin{array}{rr}6 & 3 \\ -8 & 2\end{array}\right]$
(b) $\operatorname{det}\left[\begin{array}{rrr}3 & 1 & -2 \\ 1 & -4 & 3 \\ 7 & 11 & -12\end{array}\right]$