Math Animations on Instagram: "Sarrus‘ rule is a simple and elegant method for calculating the determinant of a 3×3 matrix. It is particularly useful because it makes calculating with matrices more transparent – ​​without long formulas or complicated transformations. With this rule, you first write down the matrix and complete it by rewriting the first two columns to the right. Then you calculate two sums: The products of the three „diagonal moves“ from top left to bottom right are added, and th

Matrices and Matrix Algebra - Statistics How To