Given f(x)=x2−1f(x) = x^2 - 1f(x)=x2−1, evaluate the difference quotient \acf(x+h)−f(x)h\ac{f(x+h) - f(x)}{h}\acf(x+h)−f(x)h and simplify.
2x+h2x + h2x+h
2x2x2x
x+hx + hx+h
2x−h2x - h2x−h