Cara cari determinan matrik

| 3.....2.....1 |..3.....2
| 4......1....-1 |..4.....1
| 5....-1.....2 |..5...-1

det C = (3.1.2)+(2.(-1).5)+(1.4.(-1))-(1.1.5)-(3.(-1).(-1))-(2.4.2)
det C = 6-10-4-5-3-16
det C = -32 (B)