User Manual

TI-83 Plus Matrices 256
Chapter 10:
Matrices
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-83 Plus, you
can solve a system of linear equations by entering the coefficients as elements in
a matrix, and then using
rref(
to obtain the reduced row-echelon form.
1.Press
y >
. Press
~ ~
to display the
MATRX EDIT
menu. Press
1
to select
1: [A]
¸
2.Press
2
Í
4
Í
to define a 2×4 matrix.
The rectangular cursor indicates the current
element. Ellipses (
...
) indicate additional
columns beyond the screen.
3. Press
1
Í
to enter the first element. The
rectangular cursor moves to the second column
of the first row.