" 27."quad " If "A=[[1,2,2],[2,1,2],[2,2,1]]" ,then show that "A^(2)-4A-5I=0" ,and hence find "A^(-1)

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

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 = 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) .

IF A=[{:(1,2,2),(2,1,2),(2,2,1):}] then show 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) .

IF A=[{:(1,2,2),(2,1,2),(2,2,1):}] then show that A^2=4A-5I=O .

If A=[{:(1,2,2),(2,1,2),(2,2,1):}] , prove that A^(2)-4A-5I=O and hence, obtain 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