Texas Instruments TITANIUM TI-89 - Manual (Page 251)

Symbolic Manipulation 251
Note:
• For an overview of complex numbers, refer to the Technical Reference module.
• To get the complex i , press 2 ). Do not simply type the letter
i on the keyboard.
Be Aware of the Limitations of Substitutions Be Aware of the Limitations of Substitutions Be Aware of the Limitations of Substitutions Be Aware of the Limitations of Substitutions
• Substitution occurs only where there is an
exact match for the substitution.
Only x
2
was
replaced, not x
4
.
Define the
substitution in
simpler terms for
a more complete
substitution.