Algebra Examples

$a = [\begin{array}{c} 6 & 9 & - 1 \\ 0 & 2 & 4 \\ 7 & 8 & 2 \end{array}]$

Step 1

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$a = [\begin{array}{c} 6 & 9 & - 1 \\ 0 & 2 & 4 \\ 7 & 8 & 2 \end{array}]$