For the multiplication of matrices as...

For the multiplication of matrices as a binary operation on the set of all matrices of the form `[a b-b a],\ a ,\ b in R` the inverse of `[2 3-3 2]` is `[-2 3-3-2]` (b) `[2 3-3 2]` (c) `[2//13-3//13 3//13 2//13]` (d) `[1 0 0 1]`

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For the multiplication of matrices as a binary operation on the set of all matrices of the form `[a b-b a],\ a ,\ b in R` the inverse of `[2 3-3 2]` is `[-2 3-3-2]` (b) `[2 3-3 2]` (c) `[2//13-3//13 3//13 2//13]` (d) `[1 0 0 1]`

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