Ononot — For a block matrix M = \begin{pmatrix} A & 0 \\ C & B \end{p

Determinantsmedium

0:00.0

For a block matrix $M = \begin{pmatrix} A & 0 \\ C & B \end{pmatrix}$ where $A$ is $2 \times 2$ , $B$ is $3 \times 3$ , and $0$ is the zero matrix, which formula is correct?