A GeoGebra applet
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Revision as of 03:56, 25 March 2013 by HelmutKnaust (Talk | contribs)
The complex roots of a quartic polynomial
The coordinate system is used here in two different ways. The function f(x) is graphed in the usual x-y plane, while the four roots are in the complex plane. Note also that the roots - if complex - come in conjugate pairs.
