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Determinants

DeterminantsThe symbol is a determinant of third order that consists of nine numbers arranged in three rows and three columns.By definition, the value of a determinant of third order is given by:
A = a_{11}a_{22}a_{33}+a_{13}a_{21}a_{32}+a_{12}a_{23}a_{31}a_{13}a_{22}a_{31}a_{12}a_{21}a_{33}a_{11}a_{23}a_{33}
and is called the expansion of the determinant. To remember easily, you can use: Express the value of the determinant:
