Precalculus Examples

$[\begin{array}{c} 5 & - 5 \\ 1 & 1 \end{array}] [\begin{array}{c} 7 & 1 \\ 0 & - 1 \\ 3 & 7 \end{array}]$

Step 1

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$[\begin{array}{c} 5 & - 5 \\ 1 & 1 \end{array}] [\begin{array}{c} 7 & 1 \\ 0 & - 1 \\ 3 & 7 \end{array}]$