More is in the brew, solving for iso-curve.
Not doing as exemplified would complain NO real roots.
These two examples are simple lecture guide line, ToolBox.



Contour SOLVE Circular Code Ellipse.sm (54,55 KiB) scaricato 1405 volta(e).
Contour SOLVE Circular Code Electron.sm (52,7 KiB) scaricato 1460 volta(e).