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Mathematics 10 Online
OpenStudy (anonymous):

What is the radius of the circle whose equation is x^2+y^2+18x+12y+36=0

OpenStudy (precal):

you will have to complete the square to figure out your radius

OpenStudy (wikiemol):

(x+9)^2 + (y+6)^2 - 81 = 0

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