Evaluate the determinant of the following matrix A =
by doing a co-factor expansion.
Please expalin how to do it, thank you!
this is the exercise on my task
Why are you being asked to do a "co-factor expansion" if you don't know what that is?
I would recommend starting your co-factor expansion using the first column. That way you just have 2 times and expand that determinant on the second column. Do you see why?