Question

sabendo que a = $\left[\begin{array}{ccc}4&-1&0\\5&7&6\\2&1&3\end{array}\right]$

Answer 1

| 4 -1  0 | 4 -1
| 5  7  6 | 5  7 
| 2  1  3 | 2  1 

Det = [(4.7.3) + (-1.6.2) + (0.5.1)] - [(0.7.2) + (4.6.1) + (-1.5.3)] 


Det = [ 84 - 12 + 0 ] - [ 0 + 24 - 15 ] 


Det = [ 72 ] - [ 9 ] 


Det = 63