(a) Find the derivative of f (a) = (x2 + 9 ) (2x - 5) by first expanding the polynomials. Enter the fully simplified expression for f (a) after expanding the polynomials. f (2 ) = Enter the derivative of f (x). f' (20) = (b) Find the derivative of f (x) = (x2 + 9 ) (2x - 5) by using the product rule. Let g (x) = x2 +9 and h (ac) = 2x - 5. g (20 ) = h' ( 20 ) = f' (20 ) = (c) Are the expressions for the derivative in (a) and (b) the same? Click for List