Texas Instruments PLUS TI-89 - Manual (Page 87)

70 Chapter 3: Symbolic Manipulation
03SYMBOL.DOC TI-89/TI-92 Plus: Symbolic Manipulation (English) Susan Gullord Revised: 02/23/01 10:52 AM Printed: 02/23/01 2:12 PM Page 70 of 24
From the Home screen, press „ to display:
This menu is also available from the MATH
menu. Press 2 I and then select
9:Algebra .
Menu Item Description
solve Solves an expression for a specified variable. This
returns real solutions only, regardless of the
Complex Format mode setting. Displays answers with
" and " and " or " connecting solutions. (For complex
solutions, select A:Complex from the Algebra menu.)
factor Factors an expression with respect to all its
variables or with respect to only a specified
variable.
expand Expands an expression with respect to all its
variables or with respect to only a specified
variable.
zeros Determines the values of a specified variable that
make an expression equal to zero. Displays in a list.
approx Evaluates an expression using floating-point
arithmetic, where possible. This is equivalent to
using 3 to set
Exact/Approx = APPROXIMATE
(or using ¥ ¸ to evaluate an expression).
comDenom Calculates a common denominator for all terms in
an expression and transforms the expression into a
reduced ratio of a numerator and denominator.
propFrac Returns an expression as a proper fraction
expression.
nSolve Calculates a single solution for an equation as a
floating-point number (as opposed to
solve , which
may display several solutions in a rational or
symbolic form).
Overview of the Algebra Menu
You can use the „ Algebra toolbar menu to select the most
commonly used algebraic functions.
The Algebra Menu
Note: For a complete
description of each function
and its syntax, refer to
Appendix A.