Question

1
3
-5
1. If A = 2 -1 5 5 then trace of A is
1 0
0 1​

Answer 1

Answer:

answer is step by step ok

Answer 2

Answer:

Consider the following identity A(adjA) = LAL I. Thus comparing it with the above equation gives us IAI = 10 Now ladj AL = I AI 3 - 1 = I AI2 = 10 2 = 100.