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" If "A=[[1,2,2],[2,1,2],[2,2,1]]," show...

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

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(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

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]] , 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 = O .

If A=[[1,2,3],[3,-2,1],[4,2,1]] "show that" A^3-23A-40I=0

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

A=[[1,2,3],[3,-2,1],[4,2,1]] Show that A^3-23A-40I=0

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