I need help finding the center and the radius of a circle using the general equation. -2x^2-2y^2-12x+8y-18=0
-2(2)+1=-3
g
Question
Updated 6/19/2014 9:39:50 AM
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3
-2x^2-2y^2-12x+8y-18=0
divided by -2 on both sides the result is:
x^2 + y^2 + 6x - 4y + 9 = 0
(x^2 + 6x + 9) + (y^2 - 4y + 4) = 4
(x + 3)^2 + (y - 2)^2 = 4
The center of the circle is (-3, 2), the radius is 2.

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