Answer:
Explanation:
AI-generated answer
To add the matrices
\[
\begin{bmatrix}
9 & 2 \\
-4 & 1 \\
\end{bmatrix}
+
\begin{bmatrix}
-6 & 8 \\
7 & 6 \\
\end{bmatrix}
\]
we simply add the corresponding elements in each matrix:
\[
\begin{bmatrix}
9 + (-6) & 2 + 8 \\
-4 + 7 & 1 + 6 \\
\end{bmatrix}
\]
This simplifies to:
\[
\begin{bmatrix}
3 & 10 \\
3 & 7 \\
\end{bmatrix}
\]
Therefore, the sum of the two matrices is:
\[
\begin{bmatrix}
3 & 10 \\
3 & 7 \\
\end{bmatrix}
\]