Answer:
A. 0
Explanation:
| 1 4 4 |
| 5 2 2 |
| 1 5 5 |
a1 = | b2 b3 | = | 2 2 |
|c2 c3 | | 5 5 |
a2 = | b1 b3 | = | 5 2 |
| c1 c3 | | 1 5 |
a3 = | b1 b2 | = | 5 2 |
| c1 c2 | | 1 5 |
a1 - a2 + a3
| 2 2 | | 5 2 | | 5 2 |
(1) | 5 5 | - (4) | 1 5 | + (4) | 1 5 |
1 [(2)(5) - (2)(5)] - 4 [(5)(5) - (2)(1)] + 4[ (5)(5) - (2)(1)]
1 [10 - 10] - 4 [25 - 2] + 4 [25 - 2]
1 [0] - 4 [23] + 4 [23]
- 92 + 92 = 0
I hope this helps!