Finding the Sum of Scalar Multiples

Find the sum $3A+2B.$

$$A=\left[\begin{array}{ccc}1& -2& 0\\ 0& -1& 2\\ 4& 3& -6\end{array}\right]\text{and}B=\left[\begin{array}{ccc}-1& 2& 1\\ 0& -3& 2\\ 0& 1& -4\end{array}\right]$$

OpenStax, Algebra and Trigonometry 2e · §11.5 Matrices and Matrix Operations · Example 9