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Find the center (h,k) and radius r of the circle with the given equation.

4(x+4)^2 + 4(y-6)^2 = 324

Your equation can be rewritten

(x+4)^2 + (y-6)^2 = 81

This is the equation of a circle with radius sqrt(81) = 9, and center at (-4, 6)

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