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