Respuesta :

ritiguda

Answer:its option d


Step-by-step explanation:

(fg)(x)= (4x^2-5)(x+3)

=4x^3+12x^2-5x-15

tramserran

Answer: (D) 4x³ + 12x² - 5x - 15

Step-by-step explanation:

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