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Math Help - Center of Two Circles

  1. #1
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    Center of Two Circles

    Find an equation of the line containing
    the centers of two circles x^2 + y^2 - 4x + 6y + 4 = 0
    and x^2 + y^2 + 6x + 4y + 9 = 0
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  2. #2
    Moo
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    Hello,
    Quote Originally Posted by magentarita View Post
    Find an equation of the line containing
    the centers of two circles x^2 + y^2 - 4x + 6y + 4 = 0
    and x^2 + y^2 + 6x + 4y + 9 = 0
    1/ find the coordinates of both centers
    2/ solve for a and b in y=ax+b, by substituting the previous coordinates into x and y.
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  3. #3
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    ok....

    Quote Originally Posted by Moo View Post
    Hello,

    1/ find the coordinates of both centers
    2/ solve for a and b in y=ax+b, by substituting the previous coordinates into x and y.
    I'll try your tips and get back to you.
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