Answer
$\begin{bmatrix}
2 & 1 & 2
\\
1 & 2 & 1
\end{bmatrix}
-
\begin{bmatrix}
2 & 3 & 2
\\
3 & 2 & 3
\end{bmatrix}
=
\begin{bmatrix}
0 & -2 & 0
\\
-2 & 0 & -2
\end{bmatrix}$
Work Step by Step
Adding/subtracting the corresponding elements, the given matrix expression $
\begin{bmatrix}
2 & 1 & 2
\\
1 & 2 & 1
\end{bmatrix}
-
\begin{bmatrix}
2 & 3 & 2
\\
3 & 2 & 3
\end{bmatrix}
,$ simplifies to
\begin{align*}
&
\begin{bmatrix}
2-2 & 1-3 & 2-2
\\
1-3 & 2-2 & 1 -3
\end{bmatrix}
\\\\&=
\begin{bmatrix}
0 & -2 & 0
\\
-2 & 0 & -2
\end{bmatrix}
.\end{align*}
Hence, $
\begin{bmatrix}
2 & 1 & 2
\\
1 & 2 & 1
\end{bmatrix}
-
\begin{bmatrix}
2 & 3 & 2
\\
3 & 2 & 3
\end{bmatrix}
=
\begin{bmatrix}
0 & -2 & 0
\\
-2 & 0 & -2
\end{bmatrix}
$.
