Answer
$\begin{bmatrix} 13 &-13\\7&7\\-7&14\end{bmatrix} $
Work Step by Step
Add the corresponding elements to obtain:
$\begin{bmatrix} 4 & -3\\7&2\\-6&8\end{bmatrix} +\begin{bmatrix} 9 &-10\\0&5\\-1&6\end{bmatrix} =\begin{bmatrix} 4+9&-3-10\\7+0&2+5\\-6-1&8+6\end{bmatrix} =\begin{bmatrix} 13 &-13\\7&7\\-7&14\end{bmatrix} $
Therefore, the sum of two matrices is: $\begin{bmatrix} 13 &-13\\7&7\\-7&14\end{bmatrix}.$
