Find the vertex and axis of symmetry of the graph of the function.f(x) = x2 + 6x + 8
A. (-3, -1); x = -3
B. (-3, 1); x = -3
C. (3, -1); x = 3
D. (3, 1); x = 3
Answer: A
Mathematics
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x = 
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A. 
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