Answer:
none of the above
should be: 8x^4 -x^2
Explanation:
In the problem statement given here, when like terms are combined, the x terms cancel. None of the answer choices shows that.
x + 8x^4 – x^2 – x
= 8x^4 -x^2 +(x -x)
= 8x^4 -x^2
_____
Comment on the question
Based on the answer choices, it looks like there are typos, possibly in the given polynomial, and probably the answer choices as well. Choices A, C, and D are identical as shown here.