Answer
$\begin{bmatrix}4&10&25\\1&-11&2\\-1&26&3\end{bmatrix}$
Work Step by Step
We are given the matrices:
$B=\begin{bmatrix}1&-2&5\\0&3&1\end{bmatrix},C=\begin{bmatrix}4&6\\1&-3\\-1&8\end{bmatrix}$
Compute $CB$:
$CB=\begin{bmatrix}4&6\\1&-3\\-1&8\end{bmatrix}\begin{bmatrix}1&-2&5\\0&3&1\end{bmatrix}$
$=\begin{bmatrix}4(1)+6(0)&4(-2)+6(3)&4(5)+6(1)\\1(1)+(-3)(0)&1(-2)+(-3)(3)&1(5)+(-3)(1)\\-1(1)+8(0)&-1(-2)+8(3)&-1(5)+8(1)\end{bmatrix}$
$=\begin{bmatrix}4&10&25\\1&-11&2\\-1&26&3\end{bmatrix}$
