Find f′(x)f'(x)f′(x) if f(x)=5x2+2x−7f(x) = 5x^2 + 2x - 7f(x)=5x2+2x−7.
10x+210x + 210x+2
5x+25x + 25x+2
10x−710x - 710x−7
10x2+210x^2 + 210x2+2