Answer
$y^8$
Work Step by Step
The $r+1$ th term in the binomial expansion of $(x+y)^n$ is:
$\binom{n}{r}x^{n-r}y^r$
Here $y$ becomes $-y$, $n=8$:
The 9th term.
$r+1=9$
$r=8$
$\binom{8}{8}x^{8-8}(-y)^8=y^8$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.