SOLUTION: find the center and radius of each circle whose equation is given. (x*x)+(y*y)+4x-8=0

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Question 275550: find the center and radius of each circle whose equation is given.
(x*x)+(y*y)+4x-8=0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the center and radius of each circle whose equation is given.
(x*x)+(y*y)+4x-8=0
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x^2 + 4x + ? + y^2 = 8
Complete the square:
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x^2 + 4x + 4 +y^2 = 8 + 4
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Factor:
(x+2)^2 + y^2 = 12
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Center at (-2,0)
Radius: sqrt(12) = 2sqrt(3)
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Cheers,
Stan H.