Question 8 of 10 Find the difference quotient f (x) - f (3) x - 3 when f(x) = 3 - 2x - 4x2. Simplify the expression fully as if you were going to compute the limit as x -> 3. In particular, cancel common factors of x - 3 in the numerator and denominator if possible. (Use symbolic notation and fractions where needed.) f(x) - f(3) x - 3 Use your result to compute the derivative. (Give your answer as a whole or exact number.) f' (3) = Question Source: Roeawski de Calculus Early Transcendentals I Publisher: W.H.Freeman