Answer:
Value of (fg)(x) is:
12x³+21x²
Step-by-step explanation:
f(x) = 4x + 7, g(x) = 3x²
(fg)(x)=f(x)g(x)
=(4x+7)(3x²)
= 4x(3x²)+7(3x²)
= 12x³+21x²
Hence, value of (fg)(x) is:
