Find the values of x for which matrix `[(3,-1+x,2),(3,-1,x+2),(x+3,-1,2)]` is singular.

Explanation

To find the values of \( x \) for which the matrix

\[
A = \begin{pmatrix}
3 & -1 + x & 2 \\
3 & -1 & x + 2 \\
x + 3 & -1 & 2
\end{pmatrix}
...