Answer
\begin{bmatrix}
-2 & 1 \\
-8 & 4
\end{bmatrix}
Work Step by Step
$$
\begin{bmatrix}
1\\
4
\end{bmatrix}
\times
\begin{bmatrix}
-2 & 1
\end{bmatrix}
=
\begin{bmatrix}
1\times(-2) & 1\times1 \\
4\times(-2) & 4\times1
\end{bmatrix}
=
\begin{bmatrix}
-2 & 1 \\
-8 & 4
\end{bmatrix}
$$
