" If "A=[[1,2,2],[2,1,2],[2,2,1]]" then show that "A^(2)-4A-5I=O

A=[[1,2,2],[2,1,2],[2,2,1]] , then show that A^2-4A=5I_3

(b) answer the following questions: 1. if A=[[1,2,2],[2,1,2],[2,2,1]] , then show that A^2-4A-5I_3=0

If A =[[1,2,2],[2,1,2],[2,2,1]] then prove that A^2-4A-5I=0 .

If A=[{:(1,2,2),(2,1,2),(2,2,1):}] , then show that A^(2)-4A-5I_(3)=0 . Hemce find A^(-1) .

If A=[[1,2,22,1,22,2,1]], then prove that A^(2)-4A-5I,=O

If A=[[1,2,2],[2,1,2],[2,2,1]] , verify that : A^2-4A-5I=O

If A=|{:(1,2,2),(2,1,2),(2,2,1):}| , then show that A^(2)-4A-5I_(3)=0 . Hemce find A^(-1) .

Show that the matrix A=[[1,2,2],[2,1,2],[2,2,1]] satisfies the equation A^2-4A-5I_3=O and hence find A^(-1)

Show that the matrix A=[[1,2,2],[2,1,2],[2,2,1]] satisfies the equation A^2-4A-5I_3=0 and hence find A^(-1)

If A [{:(1,2,2),(2,1,2),(2,2,1):}] , show that A^2 -4A -5I =0