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Exams:
To divide two complex numbers, multiply by the complex conjugate of the denominator.
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Summary/Background

graphic calculatorA note about graphic calculators
A graphic calculator, for example the TI-83 or similar model, can work with complex numbers.

complex number conversionscomplex number modeFirst select MODE and move down to select a+bi:
Then press 2nd QUIT and enter a complex number sum.

Software/Applets used on this page

jsMath
This page uses jsMath You can get a better display of the maths by downloading special TeX fonts from jsMath. In the meantime, we will do the best we can with the fonts you have, but it may not be pretty and some equations may not be rendered correctly.

Glossary

complex number

A number of the form a+bi where i is the square root of -1, and a and b are real.

conjugate

of a complex number a+bi is a-bi.

mode

the value in a set of discrete data that occurs most frequently

work

Equal to F x s, where F is the force in Newtons and s is the distance travelled and is measured in Joules.

Full Glossary List