Texas Instruments Titanium TI-89, User Manual

Page: 249 / 977

Symbolic Manipulation 246
Factoring and Expanding Polynomials
Use the
factor
(
„
2
) and
expand
(
„
3
) functions.
Finding Prime Factors of a Number
The
factor
(
„
2
) function lets you do more than simply factor an algebraic polynomial.
Factor
x
5
N 1
. Then expand the result.
Notice that
factor
and
expand
perform
opposite operations.
You can find prime factors of a rational
number (either an integer or a ratio of
integers).
factor(
expression
[,
var
]
)
for factoring with respect to a variable
expand( expression
[,
var
]
)
for partial expansion with respect to a
variable