Complete the square to write the equation in the form 
+ 
= 1 or 
+ 
= 1.Determine the center, foci, and vertices of the ellipse.9x2 + y2 - 72x + 135 = 0
A. (x - 3)2 + 
= 1
center: (3, 0); foci: (3, 
), (3, -
); vertices:(3, 4), (3, -4)
B. 
+ (y - 3)2 = 1
center: (3, 0); foci: (3, 
), (3, -2
); vertices:(3, 4),
(3, -4)
C. 
+ (y - 4)2 = 1
center: (4, 0); foci: (4, 2
), (4, -2
); vertices:(4, 3), (4, -3)
D. (x - 4)2 + 
= 1
center: (4, 0); foci: (4, 2
), (4, -2
); vertices:(4, 3), (4, -3)
Answer: D
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A. r = 1
B. r = -6
C. r = 
D. r = 
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A. - 
B. 
C. - 
D. 
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