Question

Given the matrices A and B shown below, find A - B.

-11
-27
8
A =
-12 3
15
-9
12
-12
B =
10
-8
-3
-

Answer 1

`\begin{bmatrix} 7 & 3 \\ -5 & -11 \\ 12 & -1 \end{bmatrix}`

Explanation:

`(1)/(3)A=\begin{bmatrix} -4 & 1 \\ 5 & -3 \\ 4 & -4 \end{bmatrix} \\ \\ (1)/(3)A-B=\begin{bmatrix} -4 & 1 \\ 5 & -3 \\ 4 & -4 \end{bmatrix}-\begin{bmatrix} -11 & -2 \\ 10 & 8 \\ -8 & -3 \end{bmatrix}=\begin{bmatrix} 7 & 3 \\ -5 & -11 \\ 12 & -1 \end{bmatrix}`