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Mathematics 15 Online
OpenStudy (anonymous):

find the center and the radius x^2 + y^2 + 6y I already know what the graph looks like but Im having trouble finding everything else

OpenStudy (anonymous):

When you get a mixture of x^2, x, y^2 and y remeber to complete the square: x^2 +(y+3)^2 = 9, so a circle centre (0,-3) radius 3

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