Question

1. \\(\

$$\begin{bmatrix}-4n & n + m\\\\-2n & -4n\\end{bmatrix}$$

+ \

$$\begin{bmatrix}4 & -5\\\\3m & 0\\end{bmatrix}$$

\\)

Explanation:

Step1: Add top-left elements

$\boldsymbol{-4n + 4}$

Step2: Add top-right elements

$\boldsymbol{(n + m) + (-5) = n + m - 5}$

Step3: Add bottom-left elements

$\boldsymbol{-2n + 3m}$

Step4: Add bottom-right elements

$\boldsymbol{-4n + 0 = -4n}$

Answer:

$$\begin{bmatrix} -4n + 4 & n + m - 5 \\ -2n + 3m & -4n \end{bmatrix}$$