document.write( "Question 590094: find the determinant of
\n" ); document.write( " 1 2 3
\n" ); document.write( " 4 5 6
\n" ); document.write( " 2 0 1
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Algebra.Com's Answer #375018 by richard1234(7193)\"\" \"About 
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The determinant is equal to\r
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\n" ); document.write( "\n" ); document.write( "det A - 2 det B + 3 det C\r
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\n" ); document.write( "\n" ); document.write( "where A, B, and C are the 2x2 matrices that do not have any element in the same row or column as the 1, 2, 3 in the top row respectively. Recall that the determinant of the matrix\r
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\n" ); document.write( "\n" ); document.write( "|a b|
\n" ); document.write( "|c d|\r
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\n" ); document.write( "\n" ); document.write( "is ad - bc.
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