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I got 140 as my answer before but it said it was incorrect.
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I got 140 as my answer before but it said it was incorrect.

I got 140 as my answer before but it said it was incorrect.-example-1
User Piet Grootnoten
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\bf \begin{bmatrix} 11&-8\\-1&12 \end{bmatrix}\implies \stackrel{Determinant}{(11\cdot 12)-(-1\cdot -8)}\implies 132-(8)\implies 124

recall, minus * minus = plus.

User Gaurav Joseph
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