This image is an example of how to easily remember the order of operations for calculating the determinant of a 3x3 matrix using the diagonals and back-diagonals as indicated.
<ul><li>derivative work <a href="//commons.wikimedia.org/w/index.php?title=User:Fiachra&amp;action=edit&amp;redlink=1" class="new" title="User:Fiachra (page does not exist)">Fiachra</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:Determinant_3x3_Example_Barking_Mad_1.jpg" title="File:Determinant 3x3 Example Barking Mad 1.jpg">File:Determinant 3x3 Example Barking Mad 1.jpg</a>: <a href="//commons.wikimedia.org/w/index.php?title=User:Barking_Mad142&amp;action=edit&amp;redlink=1" class="new" title="User:Barking Mad142 (page does not exist)">user:Barking Mad142</a></li></ul>
2008-08-11 21:02
<ul><li><a href="//commons.wikimedia.org/wiki/File:Determinant_3x3_Example_Barking_Mad_1.jpg" title="File:Determinant 3x3 Example Barking Mad 1.jpg">Determinant_3x3_Example_Barking_Mad_1.jpg</a></li></ul>