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Mathematics 22 Online
OpenStudy (rainbow_dash):

Which equation describes a circle? 1) -5x^2 - 6x - 5y^2 -6y + 12 = 0 2) -6x^2 -6x - 12y^2 + 12y = -5 3) -2y^2 - 6y + 2x^2 - 5x - 6 = 0 4) -6y^2 - 6x + 12y = 8

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