Determine two functions, designated by y1 and y2, such that their union will give the graph of the given equation.(x - 4)2 + (y + 1)2 = 16
A. (x - 4) + (y1 + 1) = 2 and (x - 4) + (y2 + 1) = -2
B. y1 = 1 + 
and y2 = 1 - 
C. y1 = -1 + 
and y2 = -1 - 
D. y1 = -1 + 
and y2 = -1 - 
Answer: D
Mathematics
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