Answer
\[
M=
\left[ {\begin{array}{cc}
5 & 2 &1\\
7 & 10 & -7\\
\end{array} } \right]
\]
Work Step by Step
We multiply the rows by the columns.
\[
M=
\left[ {\begin{array}{cc}
1+4 & 4-2 &3-2\\
8-1 & 10 & -4-3\\
\end{array} } \right]
\]