x^2 + y^2 - 2x - 8y = -1 Can anyone thoroughly explain how to find the center and radius?
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Originally Posted by emidavis x^2 + y^2 - 2x - 8y = -1 Can anyone thoroughly explain how to find the center and radius? You need to get it to the form [mth](x - h)^2+ (y - k)^2 = r^2[/tex]. Then you can read off the centre as and the radius as . To do this in your case, you need to complete the square on and . . So the centre is and the radius is .
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