Question 669587
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Hi,
2(x+10)^+2(y-10)^2=18
(x+10)^+(y-10)^2=9   C(-10,10)
Standard Form of an Equation of a Circle is {{{(x-h)^2 + (y-k)^2 = r^2}}} 
where Pt(h,k) is the center and r is the radius