Question
If $ \begin{bmatrix} 1 & 2 & -1 \\ 1 & x - 2 & 1 \\ x & 1 & 1 \end{bmatrix} $ is singular, then the value of $x$ is.........
If $ \begin{bmatrix} 1 & 2 & -1 \\ 1 & x - 2 & 1 \\ x & 1 & 1 \end{bmatrix} $ is singular, then the value of $x$ is.........