## Algebra 2 (1st Edition)

$$\begin{pmatrix}10&7\\ -3&-6\end{pmatrix}$$
Adding the matrices by adding corresponding elements, we find: $$\begin{pmatrix}4+6&\left(-5\right)+12\\ 1+\left(-4\right)&\left(-2\right)+\left(-4\right)\end{pmatrix} \\ \begin{pmatrix}10&7\\ -3&-6\end{pmatrix}$$