1 2 2 Find A for the matrix A = 2 1 -2 then conclude what...

  

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1 2 2 Find A for the matrix A = 2 1 -2 then conclude what the inverse of A must be. 2-2 Express the inverse in terms of A and/or the identity I (e.g. 1A or 2A-I). A- = 1 2 2 Find A for the matrix A = 2 1 -2 then conclude what the inverse of A must be. 2-2 Express the inverse in terms of A and/or the identity I (e.g. 1A or 2A-I). A- =