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Topic: Find Center and Radius of Circle For This Equation
Replies: 2   Last Post: Jan 22, 2013 12:34 AM

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Butch Malahide

Posts: 894
Registered: 6/29/05
Re: Find Center and Radius of Circle For This Equation
Posted: Jan 21, 2013 7:26 PM
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On Jan 21, 4:53 pm, "Charles Hottel" <> wrote:
> The equation is:  x^2 +16x +105/16 +4y^2 +3y = 0
> I do not see how to get rid of the coefficient on y^2 without introducing a
> coefficient on x^2.
> I was able to manipulate this toget : (x + 8)^2 + 4(y +3/8)^2 = 58
> but I don't see how that helps.  I feel I must be missing something or
> perhaps the problem should have had a 4x^2 factor?  Thanks in advanc efor
> any advice on how to solve this.

That's not a circle, it's an ellipse. You can tell because of the
unequal coefficients on x^2 and y^2.

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