Question

Let f(x)=3x+5 and g(x)=x^2.

Find (f+g)(x)

A) x^2+3x+5

B) 3x^3+5x^2

C) 3x^2+5

D) x^3+5

Answer 1

`3 {x}^(3) + 5 {x}^(2)`

Answer 2

f(x)= 3x+5 and g(x)= x²

find (f+g)(x)

substitute g(x) into f(x)

3(x²)+5

the answer is C