Question

let
A=
[
1 3
2 5]
find c21
Cofactor of 2​

Answer 1

Step-by-step explanation:

Given

A = [13

25]

now

|A| = (1) |5| - 3|2|

= 5-6

= -1

cofactor of C11 = 5

cofactor of C12= 2

cofactor of C21 = 3

cofactor of C22= 1