Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = x2 - 8x - 

A. Increasing on (-4, ?) , decreasing on (-?, -4)
B. Increasing on ; decreasing on  
C. Increasing on ; decreasing on 
D. Increasing on (8, ?) , decreasing on (-?, 8)


Answer: D

Mathematics

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