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If A = [ (2,0,1),(2,1,3),(1,-1,0)] then ...

If A `= [ (2,0,1),(2,1,3),(1,-1,0)]` then find ` A^(2) - 3 A + 2 I`

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The correct Answer is:
`({:(1,-1,-1),(3,-3,-4),(-3,2,0):})`
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