COMPLEX NUMBERS Basic Operations (Page 3 of 5)

The TI-83 and TI-84 has a separate mode for working with complex numbers. In Real mode, any calculations that would result in a (nonreal) complex number will cause an error message. For example, let's try to find sqrt(-25) in Real mode. (You should be in Real mode now, which is the default).

 CLEAR key.

 2nd Square root key. Negation key. 25 Right parenthesis key. ENTER key.

 Calculator screen image. Calculator screen image.

Press choice 1 to quit. Observe that the error message indicates the calculation involves a nonreal (complex) value.
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