00:01
When we have a 2 by 2 matrix, this is just a generalization given in the form a, b, c, d.
00:14
The adjoint is given by, let's write adg, is given by d minus b minus c and a.
00:35
So let's use this to find the adjoint of a.
00:38
So a is given by 4, 3, 2, 1.
00:46
And the adjoint is given by, alright, so the 4 is in the a position, right? right here.
01:02
In the first row, first column.
01:05
So the 4 will go in the second row, second column...