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# Need help now

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The equation x^2+6x+y^2+6y=18 represents a circle. What is its center?

Feb 8, 2019

#1
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$$x^2 + 6x + y^2 + 6y = 18\\ (x-3)^2 - 9 + (y-3)^2 - 9 = 18\\ (x-3)^2 + (y-3)^2 = 36 = 6^2\\ \text{center at }(3,3), \text{ radius 6}$$

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Feb 8, 2019
#2
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Imnotamaster.

Why did you vote Rom's answer down ?

WHAT IS YOUR PROBLEM ?

Rom's answer is good and you should have thanked him and given him a point.

If you do not understand an answer then you SAY SO and ask for further explanation!

Feb 8, 2019