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Write an equation of the circle with center (9,-2) and diameter 8

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Explanation:

Equation of circle with center h,k and radius r

(x-h)^2 + (y-k)^2 = r^2

for this one this becomes (center 9,-2 and radius 4 )

(x-9)^2 + ( y+2)^2 = 16

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