Calculating the determinant of a 3x3 matrix involves a method termed "expansion by minors". This process includes removing a row and column, determining the determinant of the 2x2 sub-matrices, multiplying these by the appropriate matrix elements while switching signs alternately, and ultimately, adding the outcomes.
| Topic | Problem | Solution |
|---|---|---|
| None | 1 - Calcule estes determinantes. a) $\left|\begin… | \(\text{Matrix A} = \begin{bmatrix} 1 & 2 & 30 \\ 0 & -3 & 4 \\ 5 & 1 & -1 \end{bmatrix}\) |