Answer
$\quad
\begin{bmatrix}
-28.2 & 30.1 & -20.9 \\
7.9 & 27.9 & -37 \\
-8 & -36.4 & 7.8
\end{bmatrix}$
Work Step by Step
Multiply each element of the first matrix by -3.
$\quad
\begin{bmatrix}
-12.6 & 21.9 & -2.1 \\
-8.1 & 27.9 & -35.4 \\
-10.8 & -24.6 & 14.4
\end{bmatrix}$
Multiply each element of the second matrix by 2.
$\quad
\begin{bmatrix}
15.6 & -8.2 & 18.8 \\
-16 & 0 & 1.6 \\
-2.8 & 11.8 & 6.6
\end{bmatrix}$
Subtract the second matrix from the first matrix.
$\quad
\begin{bmatrix}
-12.6 & 21.9 & -2.1 \\
-8.1 & 27.9 & -35.4 \\
-10.8 & -24.6 & 14.4
\end{bmatrix} - \quad
\begin{bmatrix}
15.6 & -8.2 & 18.8 \\
-16 & 0 & 1.6 \\
-2.8 & 11.8 & 6.6
\end{bmatrix}$
Result:
$\quad
\begin{bmatrix}
-28.2 & 30.1 & -20.9 \\
7.9 & 27.9 & -37 \\
-8 & -36.4 & 7.8
\end{bmatrix}$
