Select the correct matrices.
Identify each matrix A such that A² has identical diagonal elements.
O [7 1 5] O [7 -1 5]
[1 5 7] [-1 7 6]
[5 7 1] [5 4 5]
O [7 4 6] O [9 18 27]
[6 4 7] [27 -9 18]
[4 6 7] [18 27 9]
O [8 1 6] O [4 5 6]
[6 8 1] [6 4 -5]
[1 6 8] [5 6 4]
