Answer
$\frac{-y^{10}}{2x^{6}}$
Work Step by Step
$\frac{-8x^3y^6}{16x^9y^{-4}}=\frac{-8}{16}x^{3-9}y^{6-(-4)}=\frac{-1}{2}x^{-6}y^{10}=\frac{-y^{10}}{2x^{6}}$
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.