Question

If f (x) =3x+10x and g(x)=5x-3,find (f+g)(x)

Answer 1

3x^2 +15x -3

Explanation:

(f +g)(x)= f(x) + g (x)

(f +g)(x)= 3x^2 + 10x + 5x -3

= 3x^2 +15x -3

Answer 2

`(f+g)(x)=3x^2+15x-3`

Explanation:

`f(x) = 3x^2+10x\\g(x) = 5x-3`

Adding both

`(f+g)(x) = 3x^2+10x+5x-3`

`(f+g)(x)=3x^2+15x-3`