Answer
The matrix $2B $ is, $2B=\left[ \begin{array}{*{35}{l}}
0 & -4 \\
6 & 4 \\
2 & -10 \\
\end{array} \right]$.
Work Step by Step
Here need to find $2B $. Therefore consider, $\begin{align}
& 2B=2\left[ \begin{array}{*{35}{l}}
0 & -2 \\
3 & 2 \\
1 & -5 \\
\end{array} \right] \\
& =\left[ \begin{array}{*{35}{l}}
2\times 0 & 2\times \left( -2 \right) \\
2\times 3 & 2\times 2 \\
2\times 1 & 2\times \left( -5 \right) \\
\end{array} \right] \\
& =\left[ \begin{array}{*{35}{l}}
0 & -4 \\
6 & 4 \\
2 & -10 \\
\end{array} \right]
\end{align}$
Thus, $2B=\left[ \begin{array}{*{35}{l}}
0 & -4 \\
6 & 4 \\
2 & -10 \\
\end{array} \right]$.
