Question

Find the determinate of the 4x4 matrix by expansion of co-factors?

a) With respect to row 2
(b) With respect to column 2

The answer for both should be 170.

The matrix is in the following post:

Answer 1

Do what I told you before, whats the problem here?

Answer 2

the 3x3 matrix after eliminating a row and column.

Answer 3

yes then for each of those you do the 2x2 matrix after eliminating a row and column.

Answer 4

That seems it would take forever....