Question

Help with a problem again please

Answer 1

`\huge\boxed{Option \ 3 : (fg)(x) = 9x^3+27x^2}`

Explanation:

`f(x) = 3x+9\\g(x) = 3x^2`

Multiplying both

`(fg)(x) = (3x+9)(3x^2)\\(fg)(x) = 9x^3+27x^2`

Answer 2

9x³ + 27x²

Explanation:

What the question is asking is to multiply f(x) and g(x) together:

Step 1: Write out expression

(fg)(x) = 3x²(3x + 9)

Step 2: Distribute

(fg)(x) = 9x³ + 27x²