:PROPERTIES: :ID: 24e47139-f20c-4c85-8e84-c73b6dd6b1f9 :mtime: 20231012013549 :ctime: 20231012013535 :END: #+title: Rule of Sarrus #+filetags: :public:project: * Definition The rule of sarrus is a method for calculating the [[id:3aadb278-8b51-4ce7-9ef2-8a27fae2349f][determinant of a matrix]] for a $3 \times 3$ method * How the determinant is calculated $\begin{vmatrix} a & b & c \\ d & e & f \\ g & h & i \end{vmatrix} = aei + bdg + cdh - (gec + hfa + idb$