Find the center (h, k) and radius r of the circle with the given equation. x2 - 4x + 4 + y2 - 8y + 16 = 9
A. (h, k) = (2, 4); r = 3
B. (h, k) = (-2, -4); r = 9
C. (h, k) = (4, 2); r = 3
D. (h, k) = (-4, -2); r = 9
Answer: A
Mathematics
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