Answer:
9x-2
Step-by-step explanation:
Since you are adding the two functions, you should first start adding like terms. 4x + 5x is 9x. -8 + 6 is -2. Thus the value of (f+g)(x) is 9x-2.
x^2 - 2xi - 4x +8i
(x -4) (x -2i) (x+2i)
739 x 4
2926 ft³ is your answer