Answer
$\begin{bmatrix}
-12 & -3 & 0\\
6 & -9 & 6
\end{bmatrix}$
Work Step by Step
We are given that $\ B=\begin{bmatrix}
4 & 1 & 0\\
-2 & 3 & -2
\end{bmatrix}$
Thus, we have: $-3B= -3 \begin{bmatrix}
4 & 1 & 0\\
-2 & 3 & -2
\end{bmatrix} \\ =\begin{bmatrix}
(-3) (4) & (-3)(1) & (-3)(0)\\
(-3)(-2) & (-3)(3) & (-3)(-2)
\end{bmatrix} \\=\begin{bmatrix}
-12 & -3 & 0\\
6 & -9 & 6
\end{bmatrix}$
