# Determinant of a matrix?

Can somebody please help me check the solutions to these 2 questions because I do not have the answers to them in my notes:

The determinant of the following matrix:

$$\begin{pmatrix} 4&0&1\\19&1&-3\\7&1&0 \end{pmatrix}$$ is

$$0 + 0 +19 - 7-0-(-12) = 24$$ and the determinant of $$\begin{pmatrix} 0&2&0\\3&0&4\\2&3&0 \end{pmatrix}$$

is

$$0+16+0-0-0-0 = 16$$

-
yes, your computations are both correct. –  awllower Feb 15 '13 at 6:32