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QUESTION
What is the value of f(-10) as a simplified fraction?
##f(-10) = -5/42##
Substitute -10 for each occurrence of ##x## in the function:
##f(-10) = (-10)/(-10^2 - 16)##
##f(-10) = (-10)/(100 - 16)##
##f(-10) = -10/84##
##f(-10) = 2/2 * -5/42##
##f(-10) = -5/42##
