Question

B = | 5 5 3|
| 2 -2 1|
| 3 0 -2|
Qual a determinante de B?

Answer 1

$\left[\begin{array}{ccc}5&5&3\\2&-2&1\\3&0&-2\end{array}\right]$
|5 5  3  5  5|
|2 -2 1 2 -2|
|3 0 -2 3  0|
 B= (20+25+0)-(-18+0-20)
 B= 35+38
 B= 73

Answer 2

Ola Joao 

5   5   3 
2  -2   1
3   0  -2
5   5   3
2  -2   1

det = 20 + 0 + 15 + 18 - 0 + 20 = 73 

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