if `A=[[1,2,2],[2,1,2],[2,2,1]]` then find the value of `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 .

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

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=[[2,0,1],[2,1,3],[1,-1,0]] , then find value of A^(2)-5A+6I

If A= [[1,2,2],[2,1,2],[2,2,1]] , find A^2-4A-5I=O

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 A = [[1,2,2],[2,1,2],[2,2,1]] satrisfies the matrix equation A^2-4A-5I_3 =0

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