Answer:its option d
Explanation:
(fg)(x)= (4x^2-5)(x+3)
=4x^3+12x^2-5x-15
Answer: (D) 4x³ + 12x² - 5x - 15
f(x) = 4x² - 5 g(x) = x + 3
(f·g)(x) = (4x² - 5)(x + 3)
= 4x²(x + 3) - 5(x + 3)
= 4x³ + 12x² - 5x - 15
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