Answer
$\begin{bmatrix}
4 & -1 & -9
\\
9 & -6 & 0
\end{bmatrix}$
Work Step by Step
Subtracting each corresponding elements of the matrices, the given matrix expression, $
\begin{bmatrix}
3 & 5 & -7
\\
0 & -2 & 0
\end{bmatrix}
-
\begin{bmatrix}
-1 & 6 & 2
\\
-9 & 4 & 0
\end{bmatrix}
,$ results to
\begin{align*}
&
\begin{bmatrix}
3-(-1) & 5-6 & -7-2
\\
0-(-9) & -2-4 & 0-0
\end{bmatrix}
\\\\&=
\begin{bmatrix}
3+1 & 5-6 & -7-2
\\
0+9 & -2-4 & 0-0
\end{bmatrix}
\\\\&=
\begin{bmatrix}
4 & -1 & -9
\\
9 & -6 & 0
\end{bmatrix}
.\end{align*}
Hence, the given matrix operation results to $
\begin{bmatrix}
4 & -1 & -9
\\
9 & -6 & 0
\end{bmatrix}
.$
