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Thread: Weird Circle Equation

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    Cadet Heresy's Avatar
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    Weird Circle Equation

    Here it is:

    Find the coordinates of the centre and find the radius of a circle with an equation of:

    x^2 + 8x + y^2 - 6y


    I haven't seen a circle equation like this, so I am confused. Any response would be appreciated.

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    Junior Member HeroWise's Avatar
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    Re: Weird Circle Equation

    You have to complete the square and you get centre (-4,3) and radius 5
    Heresy likes this.

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    Cadet Heresy's Avatar
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    Re: Weird Circle Equation

    Quote Originally Posted by HeroWise View Post
    You have to complete the square and you get centre (-4,3) and radius 5
    Thank you so much!

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