Texas Instruments TITANIUM TI-89 - Manual (Page 246)

Symbolic Manipulation 246
How Long Is the Simplification Process? How Long Is the Simplification Process? How Long Is the Simplification Process? How Long Is the Simplification Process?
Depending on the complexity of an entry, result, or intermediate expression, it can take a
long time to expand an expression and cancel common divisors as necessary for
simplification.
To interrupt a simplification process that is taking too long, press ´. You can then try
simplifying only a portion of the expression. (Auto-paste the entire expression on the
entry line, and then delete the unwanted parts.)
• Polynomial greatest common divisors are
canceled.
• Polynomials are expanded unless no key
cancellation can occur.
• Common denominators are formed
unless no key cancellation can occur.
• Functional identities are exploited. For
example:
ln(2x) = ln(2) + ln(x)
and
sin(x)
2
+ cos(x)
2
= 1
No key cancellation
No key cancellation