Answer
$\left[\begin{array}{ll}
-4 & 8\\
0 & 6\end{array}\right]$
Work Step by Step
We are given that $A=\left[\begin{array}{ll}
-2 & 4\\
0 & 3\end{array}\right]$
Now, $2A=2\left[\begin{array}{ll}
-2 & 4\\
0 & 3\end{array}\right]=\left[\begin{array}{ll}
-2 (2) & 4 (2) \\
0(2) & 3(2)\end{array}\right]\\=\left[\begin{array}{ll}
-4 & 8\\
0 & 6\end{array}\right]$
