Question

Solve:
$A=\left[\begin{array}{cc}5a& -b\\ 3& 2\end{array}\right]$

Answer 1

$wehaveA=\left[\begin{array}{cc}5a& -b\\ 3& 2\end{array}\right]nowA=\left[\begin{array}{cc}5a& -b\\ 3& 2\end{array}\right]A=10a+3b$