Use the first derivative to find all critical points and use the second derivative to find all inflection points. Use a graph to identify each critical point as a local naximum, a local minimum, or neither. f(x)=2x+3x²-120x +4 Enter the exact answers in increasing order. If there is no answer, enter "NA". The critical point at x = 4 is The critical point at x = -5 is

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