Answer
$\begin{bmatrix} 4 & 10 & 26 \\ 1 & -11 & 2\\ -1 & 26 & 3 \end{bmatrix}$
Work Step by Step
Given $A=\begin{bmatrix} 1 & -1\\ 0 & -4 \\ 3 & 2 \end{bmatrix}$, $B=\begin{bmatrix} 1 & -2 & 5 \\ 0 & 3 & 1 \end{bmatrix}$, $C=\begin{bmatrix} 4 & 6\\ 1 & -3 \\ -1 & 8 \end{bmatrix}$,
We have:
$CB=\begin{bmatrix} 4 & 6\\ 1 & -3 \\ -1 & 8 \end{bmatrix}\times\begin{bmatrix} 1 & -2 & 5 \\ 0 & 3 & 1 \end{bmatrix}=
\begin{bmatrix} 4 & 10 & 26 \\ 1 & -11 & 2\\ -1 & 26 & 3 \end{bmatrix}$
