PLease help explain answers

(a) Find the derivative of f (a) = (a2 + 9 ) (4x - 3) by first expanding the polynomials. Enter the fully simplified expression for f () after expanding the polynomials. F a a ab Va na ? f (2) = 1 Enter the derivative of f (x).(b) Fund the derivative of f (2:) = (2:2 + 9) (42: 3) by using the product rule. Let g (m) = 2:2 + 9 and h (at) = 4:1: 3. ab g J5 lal 7: since) an o 9'(m) =E ab % J5 [a] r: sin(a.) M 0 Wm) =E ab g '5 lal 1: since) an o f'($)=' (1:) Are the expressions for the derivative in (a) and (b) the same