Answer :
Answer:
Consider the matrices
[tex]A=\left[\begin{array}{ccc}1&-3\\3&1\end{array}\right][/tex] y [tex]B=\left[\begin{array}{ccc}4&2\\-2&4&\end{array}\right][/tex]
Observe that
[tex]AB=\left[\begin{array}{ccc}1&-3\\3&1\end{array}\right]\left[\begin{array}{cc}4&2\\-2&4\end{array}\right]=\left[\begin{array}{cc}10&-10\\10&10\end{array}\right][/tex]
and
[tex]BA=\left[\begin{array}{cc}4&2\\-2&4\end{array}\right]\left[\begin{array}{ccc}1&-3\\3&1\end{array}\right]=\left[\begin{array}{cc}10&-10\\10&10\end{array}\right][/tex]