A sphere has the equation  x^2 +4x + y^2 -6y +z^2=3 what is the center of the sphere please give in cordinate and it's radius

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
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Chapter6: Topics In Analytic Geometry
Section6.6: Parametric Equations
Problem 5ECP: Write parametric equations for a cycloid traced by a point P on a circle of radius a as the circle...
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A sphere has the equation 

x^2 +4x + y^2 -6y +z^2=3

what is the center of the sphere please give in cordinate

and it's radius

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