Question
If $A = \begin{bmatrix} 2 - k & 2 \\ 1 & 3 - k \end{bmatrix}$ is a singular matrix, then the value of $5k - k^2$ is equal to:
If $A = \begin{bmatrix} 2 - k & 2 \\ 1 & 3 - k \end{bmatrix}$ is a singular matrix, then the value of $5k - k^2$ is equal to: