Row 1, column 1:
Hint: Row 1 of $A$ is $\begin{pmatrix} -2 & 8 \end{pmatrix}$. Column 1 of $B$ is $\begin{pmatrix} 8 \\ 6 \end{pmatrix}$. Multiply in pairs and add the results.
Row 1, column 2:
Hint: Row 1 of $A$ is $\begin{pmatrix} -2 & 8 \end{pmatrix}$. Column 2 of $B$ is $\begin{pmatrix} 0 \\ 8 \end{pmatrix}$. Multiply in pairs and add the results.
Row 1, column 3:
Hint: Row 1 of $A$ is $\begin{pmatrix} -2 & 8 \end{pmatrix}$. Column 3 of $B$ is $\begin{pmatrix} 8 \\ 0 \end{pmatrix}$. Multiply in pairs and add the results.
Row 2, column 1:
Hint: Row 2 of $A$ is $\begin{pmatrix} 0 & 5 \end{pmatrix}$. Column 1 of $B$ is $\begin{pmatrix} 8 \\ 6 \end{pmatrix}$. Multiply in pairs and add the results.
Row 2, column 2:
Hint: Row 2 of $A$ is $\begin{pmatrix} 0 & 5 \end{pmatrix}$. Column 2 of $B$ is $\begin{pmatrix} 0 \\ 8 \end{pmatrix}$. Multiply in pairs and add the results.
Row 2, column 3:
Hint: Row 2 of $A$ is $\begin{pmatrix} 0 & 5 \end{pmatrix}$. Column 3 of $B$ is $\begin{pmatrix} 8 \\ 0 \end{pmatrix}$. Multiply in pairs and add the results.
Row 3, column 1:
Hint: Row 3 of $A$ is $\begin{pmatrix} -2 & -4 \end{pmatrix}$. Column 1 of $B$ is $\begin{pmatrix} 8 \\ 6 \end{pmatrix}$. Multiply in pairs and add the results.
Row 3, column 2:
Hint: Row 3 of $A$ is $\begin{pmatrix} -2 & -4 \end{pmatrix}$. Column 2 of $B$ is $\begin{pmatrix} 0 \\ 8 \end{pmatrix}$. Multiply in pairs and add the results.
Row 3, column 3:
Hint: Row 3 of $A$ is $\begin{pmatrix} -2 & -4 \end{pmatrix}$. Column 3 of $B$ is $\begin{pmatrix} 8 \\ 0 \end{pmatrix}$. Multiply in pairs and add the results.