x^2+y^2-6x+8y+9=0

determine the center and the radius of each circle
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1 Answer

x^2 +y^2 -6x +8y +9=0

(x-3)^2 +(y+4)^2 +9 -9-16=0

(x-3)^2 +(y+4)^2=16=4^2

serkel...radius=4, senter=(3,-4)
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