Calculate the determinant of the following matrices. Clearly write the co-factors and write
the expansion. Please do not take the short cut and simply write the final answer.
2
6
6
6
6
4
204
5 10
0 23
3
7
7
7
7
5
,
2
6
6
6
6
4
23 4
56 7
8 9 10
3
7
7
7
7
5
,
2
6
6
6
6
4
1 3 4
010
023
3
7
7
7
7
5
,
2
6
6
6
6
4
5 6 11
3 6 10
17 9
3
7
7
7
7