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If f(x)=x^2-5x+6. Find f(A),if A=[(2,0,1...

If `f(x)=x^2-5x+6.` Find `f(A),if A=[(2,0,1),(2,1,3),(1,-1,0)]`.

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` A=[{:(2,0,1),(2,1,3),(1,-1,0):}]`
`therefore A^(2)=A.A=[{:(2,0,1),(2,1,3),(1,-1,0):}][{:(2,0,1),(2,1,3),(1,-1,0):}]`
`=[{:(4+0+1,0+0-1,2+0+0),(4+2+3,0+1-3,2+3+0),(2-2+0,0+1-0,1-3+0):}]`
`=[{:(5,-1,2),(9,-2,5),(0,-1,-2):}]`
`Now A^(2)-5A+6l`
`=[{:(5,-1,2),(9,-2,5),(0,-1,-2):}]-5[{:(2,0,1),(2,1,3),(1,-1,0):}]+6[{:(1,0,0),(0,1,0),(0,0,1):}]`
`=[{:(5,-1,2),(9,-2,5),(0,-1,-2):}]+[{:(-10,0,-5),(-10,-5,-15),(-5,5,0):}]+[{:(6,0,0),(0,6,0),(0,0,6):}]`
`=[{:(1,-1,-3),(-1,-1,-10),(-5,4,4):}]`
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