If
\[
\left|
\begin{matrix}
x-3& 2& 1\\
3& x-2& 1\\
3& 2& x-1
\end{matrix}
\right|
=
(x-2)(px^{2}+qx+r)+8,
\]
then \(3p-2q+r=\)
Show Hint
When a determinant is expressed in factorized polynomial form, first compute the determinant completely and then compare coefficients or divide by the given factor.