Question

if A is a square matrix of order 3 such that modolus of A is 5 find modolous of A.adjA​

Answer 1

Answer: hope this helps you my friend     PLEASE MARK BRAINLIEST

Step-by-step explanation:

Given matrix A of order n,

A^-1=adj(A)|A|;

We know that, A⋅A^-1=I

⇒A⋅(adj(A)|A|)=I

⇒A⋅adj(A)=|A|⋅I

⇒|A⋅adj(A)|=|A|^n

Therefore, here |A•adj(A)| = 12^3