Question

f(x)=8−4x−x3 g(x)=x2+7x−9 Find f(x)+g(x). Select one: a. x3+x2+3x−1 b. −x3+x+3x−1 c. −x3+x2+11x−9 d. 8x2+3x−9x3

Answer 1

B

Explanation:

We are given the two functions:

`f(x) = 8 - 4x - x^3\text{ and } g(x) = x^2 + 7x - 9`

And we want to find:

`f(x) + g(x)`

Substitute:

`= (8 - 4x - x^3) + (x^2 + 7x - 9)`

Rewrite:

`= (-x^3) + (x^2) + (7x - 4x) + (8 - 9)`

Combine like terms:

`= -x^3 + x^2 +3x -1`

In conclusion:

`f(x) + g(x) = -x^3 + x^2 +3x -1`

Hence, our answer is B.