Texas Instruments TITANIUM TI-89 - Manual (Page 255)

Symbolic Manipulation 255
Caution: After x is defined, it can affect all calculations that involve x (until you delete x).
Overview of the Algebra Menu Overview of the Algebra Menu Overview of the Algebra Menu Overview of the Algebra Menu
You can use the „
Algebra toolbar menu to select the most commonly used algebraic
functions.
The Algebra Menu The Algebra Menu The Algebra Menu The Algebra Menu
From the Home screen, press „ to display:
Storing 1
!
x affects the subsequent
calculations.calculation.
This menu is also available from the MATH
menu. Press 2 I and then select
9:Algebra .