anonymous
  • anonymous
the center of the circle defined by 2x^(2)+2y^(2)+4x-12y-30=0 is a) (-1,3) b) (2,-6) c) (-2,6) d) (1,-3)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
I'm guessing I divide everything by 2 to begin with, but what happens to the squares?
anonymous
  • anonymous
-1,3
anonymous
  • anonymous
You just have to turn everything into a more usable form : (x-a)^2-(y-b)^2=radius^2, where a and b are the coordinates of the circle's center :) Hope that helped

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anonymous
  • anonymous
adams right
anonymous
  • anonymous
(x-a)^2+(y-b)^2=r^2 is the form.
anonymous
  • anonymous
So mainly you should try to complete the squares.
R
  • R
Do you know how to "complete the squares" for this problem?

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