Answer
$\begin{bmatrix}
-8 & 7 & -15\\
7 & 0 & 22
\end{bmatrix}$
Work Step by Step
Since, matrices $A$ and $B$ are both $ 2 \times 3$ matrices and have the same dimensions, we know that their subtraction, $3A-2B$, is defined.
$3A-2B=3 \begin{bmatrix}
0 & 3 & -5\\
1 & 2 & 6
\end{bmatrix}-2\begin{bmatrix} 4 & 1 & 0\\
-2 & 3 & -2
\end{bmatrix} \\=\begin{bmatrix}
3\cdot 0 & 3\cdot 3 & 3\cdot(-5)\\
3\cdot 1 & 3\cdot 2 & 3\cdot 6
\end{bmatrix}-\begin{bmatrix}
2\cdot 4 & 2\cdot 1 & 2\cdot 0\\
2\cdot(-2) & 2\cdot 3 & 2\cdot(-2)
\end{bmatrix} \\=\begin{bmatrix}
0-8 & 9-2 & -15-0\\
3-(-4) & 6-6 & 18-(-4)
\end{bmatrix}\\=\begin{bmatrix}
-8 & 7 & -15\\
7 & 0 & 22
\end{bmatrix}$
