Answer
$\begin{bmatrix}
-13&7&-12\\
-18&10&-14\\
17&-7&34\end{bmatrix}$
Work Step by Step
Refer to sum $\#17$ and $\#18$ for determination of $CA$ and $CB$, respectively.
$\implies CA-CB = \begin{bmatrix}1&14&-14\\2&22&-18\\3&0&28\end{bmatrix}-\begin{bmatrix}14&7&-2\\20&12&-4\\-14&7&-6\end{bmatrix}$
We subtract two matrices by subtracting their respective individual elements.
$\therefore CA-CB = \begin{bmatrix}
1-14&14-7&-14+2\\2-20&22-12&-18+4\\3+14&0-7&28+6\end{bmatrix} =\begin{bmatrix}
-13&7&-12\\
-18&10&-14\\
17&-7&34\end{bmatrix}$
