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Math Help - The center of circle

  1. #1
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    The center of circle

    The equation of a circle is x^2+6x+y^2-2y=12 ,what is the center ?
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  2. #2
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    Re: The center of circle

    You need to complete the square. I'll do the x bit x^2+6x=(x+3)^2-9
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  3. #3
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    Re: The center of circle

    I forgot how to complete the square ,i will search that .
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  4. #4
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    Re: The center of circle

    Aha so the answer should be (-3,1).
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  5. #5
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    Re: The center of circle

    You got it.

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