Question

Solve Section=B with all steps and do it correctly please. I have a test and very less time. I promise to give thanks in return and also brainliest.
See I'm giving more points.

Answer 1

Answer:

Q.3 Consider the following identity A(adjA)=∣A∣I. Thus comparing it with the above equation gives us ∣A∣=10

Now ∣adjA∣=∣A∣

n−1

where n is the order of the square matrix.

Here 'n' is 3, therefore, ∣adjA∣=∣A∣

3−1

=∣A∣

2

=10

2

=100.

Q.5 on the attachment

Q.4