Question

Let f(x) = 5x3 + 3x2 – 3 and g(x) = x2 + X - 5, fin
4) f(x) + g(x)

Answer 1

`f(x)+g(x)=5x^(3) +4x^(2)+x-8`

Explanation:

Given:

Two functions are given:

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

`g(x)=x^(2) +x-5`

Find
`f(x)+g(x)`

Solution:

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

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

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

`f(x)+g(x)=5x^(3) +4x^(2)+x-8`

Therefore, the function of
`f(x)+g(x)=5x^(3) +4x^(2)+x-8`