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    Inverse of A using Cayley-Hamilton?

    Homework Statement 　　　2 -1 1 A = -1 2 -1 　　　-1 -1 2 Find A^-1 using Cayley Hamilton Theorem?Homework Equations The Attempt at a Solution http://i.imm.io/lyhB.jpeg I came thus far, 0 = -A^3 + 6A^2 - 11 + 6I How do I manipulate the above to get A^-1?
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