10 (1) D =
|1 1 -1 2 -3|
|0 0 -5 3 2|
|0 2 -4 -5 8|
|0 -3 5 -4 4|
|0 -3 5 -4 5|
D =
| 0 -5 3 2|
| 2 -4 -5 8|
|-3 5 -4 4|
|-3 5 -4 5|
D =
| 0 -5 3 2|
| 2 -4 -5 8|
|-3 5 -4 4|
| 0 0 0 1|
D =
| 0 -5 3 |
| 2 -4 -5|
|-3 5 -4 |
D = -75 + 30 - 36 - 80 = -161