Answer:
Step-by-step explanation:
[tex]A=\left[\begin{array}{ccc}-3&5&2\\8&-1&3\end{array}\right] \\-7.A=-7\left[\begin{array}{ccc}-3&5&2\\8&-1&3\end{array}\right] \\=\left[\begin{array}{ccc}21&-35&-14\\-56&7&-21\end{array}\right][/tex]
