Given the polynomial functions, find the product function and the specified value.Let f(x) = x + 3 and g(x) = x2 - 9x - 7. Find (fg)(x) and (fg)(-4).

A. (fg)(x) = x3 + 12x2 + 34x + 21; (fg)(-4) = 285
B. (fg)(x) = 3x3 + 27x2 - 21x; (fg)(-4) = -540
C. (fg)(x) = x3 - 9x2 - 7x; (fg)(-4) = -180
D. (fg)(x) = x3 - 6x2 - 34x - 21; (fg)(-4) = -45


Answer: D

Mathematics

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