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## Homework Statement

Let have the problem to find the complex generalized cirlce of radius r

## Homework Equations

[tex]|z-c|^2 = r^2 [/tex]

## The Attempt at a Solution

hvor r is the radius and c the center..

by expanding the above

[tex]z\overline{z} - z\overline{c} - \overline{z}c + c\overline{c} -r^2 = 0[/tex]

I know that if I multiply with a real number when I can get a more pretty expression, but what as is my motivation to do this?

/Susanne