Friendly Cubics

How does the sketch below explain why any equation of the form [math]x^3=bx+c[/math] must have at least one real solution? Would this mean [i]any[/i] cubic will have a real solution?

 

Steve Phelps

 
Resource Type
Activity
Tags
2015  complex  complex-numbers  mat  numbers 
Target Group (Age)
3 – 19+
Language
English
 
 
GeoGebra version
5.0
Views
4564
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