Answer
$$
\left[ \begin{array}{ccc} 3&0&6\\ 2&-3&4\\1&-2&-2\end{array} \right]=0.
$$
Work Step by Step
Given
$$
\left[ \begin{array}{ccc} 3&0&6\\ 2&-3&4\\1&-2&-2\end{array} \right].
$$
Since the third column is the multiple of the first column by $2$, then we have
$$
\left[ \begin{array}{ccc} 3&0&6\\ 2&-3&4\\1&-2&-2\end{array} \right]=0.
$$
