Answer :

LammettHash

Notice that A is simply -1 times the identity matrix. So

[tex]AB = -1 \times IB = -1 \times B = -B[/tex]

so that

[tex]AB = \begin{bmatrix}-1&-2&-2&-4&-4&-5\\-3&-2&-4&-2&-4&-3\end{bmatrix}[/tex]

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