Find the determinant of the matrix:
\[A = \begin{bmatrix} 4 & -1 \\ 20 & -5 \end{bmatrix}\]Click for (rounded) answer
Click for Latex code
\[
\begin{bmatrix}
4 & -1 \\
20 & -5
\end{bmatrix}
\]
Determinant:
\begin{solution}
\[
\det A = 0
\]
\end{solution}