Using 'alternate' form of the circle equation in CAS

pirsquared shared this question 8 years ago
Needs Answer

Hi all,

I was hoping there might be some CAS function that could convert, eg. x²+y²-4x+8y-5=0 into the form (x-2)²+(y-4)²=25. Geogebra can clearly handle the interchange internally, since it is possible to view the equation of the circle in either form, but I would really like to know if there is a way of 'persuading' Geogebra's CAS to display the completed-square version instead of the expanded form.

Many thanks,


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