Respuesta :

f(x) = 3x² + 2

g(x) = √(7x³)

Basically you need to evaluate f(x) for x = g(x), in another words, replace every x in f(x) for g(x):

f(g(x)) = 3 (√(7x³) )² + 2 = 3(7x³) + 2 = 21x³ + 2

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