3x2+3y2-12x-18y+12=0 is the equation of a circle with center (h,k) and radius r for:  objective: find h,k, and r please show written work

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.CR: Chapter Review
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3x2+3y2-12x-18y+12=0 is the equation of a circle with center (h,k) and radius r for: 

objective: find h,k, and r

please show written work

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