Find the determinant of each of the following matrices:

1. [ 9 0 0
1 2 0
2 −2 0 ]

2. [ 1 4 −2
0 −3 1
1 1 −1 ]

3. [ 0 3 1
5 −1 −2
0 −2 1 ]

4. [ −3 6 9
9 12 −3
0 15 −6 ]

5. [ 4 3 0
1 2 −3
2 −2 1 ]​