Solve the problem.Find the standard form of the equation of the circle. Assume that the center has integer coordinates and the radius is an integer. 
A. (x - 1)2 + (y + 2)2 = 9
B. x2 + y2 - 2x + 4y - 4 = 0
C. x2 + y2 + 2x - 4y - 4 = 0
D. (x + 1)2 + (y - 2)2 = 9
Answer: D
Mathematics
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= ?s - 7?
A. 
B. {
, - 
}
C. ?
D. {- 
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> k?
A. {0}
B. (-?, ?)
C. ?
D. (- 
, 
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.
?
A. 
B. ?
C. ?
D. ?
E. ?
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