Write the standard form of the equation of the circle.The endpoints of a diameter are (3, 6) and (9, 6).
A. (x - 6)2 + (y - 6)2 = 3
B. (x + 6)2 + (y + 6)2 = 3
C. (x + 6)2 + (y + 6)2 = 9
D. (x - 6)2 + (y - 6)2 = 9
Answer: D
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