For example, if
A =
3
1
1 5
5
7
3
2
0
5



−






, then
3A =
3
1
1 5
9
3
4 5
3
5
7
3
3 5
21
9
2
0
5
6
0
15








−
=
−












Negative of a matrix The negative of a matrix is denoted by – A