(a) Find the derivative of f (x) = (x² + 6) (2x – 5) by first expanding the polynomials. Enter the fully simplified expression for f (x) after expanding the polynomials. a |a| az Va na f (x) = & Enter the derivative of f (x). a Va |a| sin (a) f' (x) =D (b) Find the derivative of f (x) = (x² + 6) (2æ – 5) by using the product rule. Let g (æ) = x2 + 6 and h (x) = 2x – 5. a Va |a| sin (a) g' (x) = & a la sin (a) h' (x) = & a Va la| sin (a) f' (z) = D (c) Are the expressions for the derivative in (a) and (b) the same?

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A: given, f(x)=x(x2-4)

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A: