Question

choose the right one !! ​

Answer 1

Answer:

The right answer is option A

Answer 2

Answer:

C 324

Step-by-step explanation:

$formula \\ \\ det(adj \: a) = {(det \: (a))}^{n - 1} \\ \\ here \: n = 3 \\ \\ \\ det(adj \: a) = {(det \: (a))}^{2} \\ \\ det \: a = \: 1(6 - 1) - 2(4 - 3) + 3(2 - 9) \\ \\ = 5 - 2 - 21 \\ \\ = - 18 \\ \\ det(adj \: a) = {( - 18)}^{2} = 324$

Hope it Helps