Find and simplify this version of the difference quotient f(3+h)-f(3)/h for the function f(x)=x^2-7

Question

What steps would be taken to simplify after substituting the values in?

Answer 1

f(x) = x² - 7

[ f(3+h) - f(3)] / h = [(3+h)² - 7 - 2] / h = [9 + 6h + h² - 9] / h = h(6 + h) / h = 6 + h