Answer
$30$
Work Step by Step
The elements of the first row are $0, 1$ and $2$. The first row of the array of signs is $ + , - , +$ .
$$\begin{vmatrix}
0 & 1 & 2\\
3 & -1 & 2\\
3 & 2&-2
\end{vmatrix}=0\begin{vmatrix}
-1 & 2 \\
2 & -2
\end{vmatrix}-1\begin{vmatrix}
3 & 2 \\
3& -2
\end{vmatrix}+2\begin{vmatrix}
3 & -1 \\
3& 2
\end{vmatrix}$$
$$=0(2-4)-1(-6-6)+2(6-(-3))=0+12+18=30$$
