How to solve a 3x3 matrix using the rule of Sarrus - Casio fx-82MS

How to solve a 3x3 matrix using the rule of Sarrus - Casio fx-82MS

Make sure to assign the calculator variables as follows: a11 A a12 B a13 C a21 D a22 E a23 F a31 X a32 Y a33 M With practice you can solve the system in less than 2 minutes.