I am unsure on how i would approach this problem

Find the difference quotient f (x) - f(2 ) x - 2 when f(x) = 4 + 4x + 6x2. Simplify the expression fully as if you were going to compute the limit as x - 3. In particular, cancel common factors of x - 2 in the numerator and denominator if possible. (Use symbolic notation and fractions where needed.) f(x) - f(2) x - 2 =