Question
If $A = \begin{pmatrix} 2 & 1 \\ 1 & 3 \end{pmatrix}$, then the determinant of $A^2 - 5A + 7I$ is:
Options
- A
$1$
- B
$5$
- C
$7$
- D
$25$
If $A = \begin{pmatrix} 2 & 1 \\ 1 & 3 \end{pmatrix}$, then the determinant of $A^2 - 5A + 7I$ is:
$1$
$5$
$7$
$25$