Answer:
24702x + 9
Explanation:
First, put everything you need to in parenthisis.
(2x^4) + (12x^4) + (16x^3) - (12x^2) - (18x + 9)
Then Simplifly
32x + 20736x + 4096x - 144x -18x + 9
Now Simplifly everything one by one
20768x + 4096x - 144x - 18x + 9
24864x - 144x - 18x + 9
24720x - 18x +9
24702x + 9
Now you can stop there, or solve for X by dividing each # by 24702