Evaluate Each Determinant $\operatorname{det}\left[\begin{array}{rr}-6 & 9 \\ 4 & -5\end{array}\right]$ (B) $\operatorname{det}\left[\begin{array}{rrr}2 & 0 & -2 \\ 3 & 1 & 5 \\ 6 & 4 & 3\end{array}\right]$

Short Answer

Evaluate each determinant.
(a) $\operatorname{det}\left[\begin{array}{rr}-6 & 9 \\ 4 & -5\end{array}\right]$
(b) $\operatorname{det}\left[\begin{array}{rrr}2 & 0 & -2 \\ 3 & 1 & 5 \\ 6 & 4 & 3\end{array}\right]$