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$[\begin{array}{c} - 8 & - 9 & - 3 \\ 6 & 9 & 0 \end{array}]$

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Transpose the matrix by switching its rows to columns.

$[\begin{array}{c} - 8 & 6 \\ - 9 & 9 \\ - 3 & 0 \end{array}]$