Answer
\begin{bmatrix}
-10 & -28 \\
-17 & 7
\end{bmatrix}
Work Step by Step
$$
\begin{bmatrix}
2 & -4 \\
6 & 1
\end{bmatrix}
\times
\begin{bmatrix}
-3 & 0 \\
1 & 7
\end{bmatrix}
=
\begin{bmatrix}
(2\times(-3))+(-4\times1) & (2\times0)+(-4\times7) \\
(6\times(-3))+(1\times1) & (6\times0)+(1\times7)
\end{bmatrix}
=
\begin{bmatrix}
-10 & -28 \\
-17 & 7
\end{bmatrix}
$$
