Question

Factoring Matrix

Answer 1

what factoring method is it?

Answer 2

you can factor out a constant from the determinant, if that constant is multiplied to
1) each element of any row or
2) each element of any column.

from 2 8 6 , you write that as 2*1 2*4 2*6 and factor 2 out of determinant
similarly for 3