Casio fx-991EX Quick Start Manual page 14

MATRIX
Enter the matrix values by pressing
3pz6p8p2p.
To perform matrix calculations, like addition, subtraction, and
multiplication, follow these simple commands.
To recall the name of a matrix, press i.
To add A + B, press 3(MatA)+i4(MatB)p.
The solution matrix is displayed in the window and can be viewed
without scrolling.
To calculate the determinant of the matrix, press
iR2(Determinant) i3(MatA))p.
Matrices can be used to solve a system of equations.
Take the following equation with 3 unknowns:
Enter the coefficient matrix as Matrix A and the solution matrix as Matrix B.
14 fx-991EX Quick Start Guide