Operation Manual

10-2 Matrices
8210MTRX.DOC TI-82, Chapter 10, English Bob Fedorisko Revised: 02/09/01 9:18 AM Printed:
02/09/01 12:38 PM Page 2 of 14
Getting Started: Systems of Linear Equations
Getting Started is a fast-paced introduction. Read the chapter for details.
Find the solution of x + 2y + 3z = 3 and 2x + 3y + 4z = 3. On the TI
.
82, you can
solve a system of linear equations by entering the coefficients as elements in a
matrix and then using the matrix row operations to obtain the reduced row
echelon form.
1. Press

. Press
~ ~
to display the
MATRX EDIT
menu. Press
1
to select
ã
A
ä
to edit
matrix
ã
A
ä
.
2. Press
2
Í
4
Í
to define a 2×4 matrix.
The rectangular cursor indicates the current
element. The ellipses points at the right
indicate that one or more additional columns
exist.
3. Press
1
Í
to enter the first element. The
rectangular cursor moves to the second
column of the first row.
4. Press
2
Í
3
Í
3
Í
to complete the
top row.
5. Press
2
Í
3
Í
4
Í
3
Í
to enter
the bottom row.