Answer
$\begin{bmatrix} -2 &-5\\17&4\end{bmatrix} $
Work Step by Step
Add the corresponding elements to obtain:
$\begin{bmatrix} -4 & 3\\12&-6\end{bmatrix} +\begin{bmatrix} 2 &-8\\5&10\end{bmatrix} =\begin{bmatrix} -4+2&3-8\\12+5&-6+10\end{bmatrix} =\begin{bmatrix} -2 &-5\\17&4\end{bmatrix} $
Therefore, the sum of two matrices is: $\begin{bmatrix} -2 &-5\\17&4\end{bmatrix} $.
