The Math and Stats Center

Complex Numbers


  • The TI-82 cannot do operations with complex numbers.


TI-83 and TI-84

  • On the TI-83 and 84, there is a little script i above the decimal point.
  • You may need to change MODE from Real to a+bi.


TI-85 and TI-86

  • The TI-85 and TI-86 use a different notation.
  • Rather than a+bi, they use (a,b).
  • For example, to enter (4+i)+(5+i), type (4,1)+(5,1).
  • The calculator will give (9,2), i.e. 9+2i, as the answer.

Page last modified September 23, 2011