M math951 Jul 2015 613 16 United States Sep 12, 2016 #1 f(x)=2x^3+9x^2-60x+4 this polynomial is not factorable.. do I just put no x values as the answer or what should I put Woops.! My bad. I had to derive this whole equation with the power rule of derivative hehe Last edited: Sep 12, 2016

f(x)=2x^3+9x^2-60x+4 this polynomial is not factorable.. do I just put no x values as the answer or what should I put Woops.! My bad. I had to derive this whole equation with the power rule of derivative hehe

H HallsofIvy MHF Helper Apr 2005 20,249 7,909 Sep 12, 2016 #2 Well, I would use the word "differentiate" rather than "derive" but, yes, the slope of the tangent line to the graph of y= f(x), at x= a, is f'(a). A line is horizontal if and only if that slope is 0: f'(x)= 0. You need to solve f'(x)= 0.

Well, I would use the word "differentiate" rather than "derive" but, yes, the slope of the tangent line to the graph of y= f(x), at x= a, is f'(a). A line is horizontal if and only if that slope is 0: f'(x)= 0. You need to solve f'(x)= 0.