Answer
$\frac{18x^{14}}{y^{10}}$
Work Step by Step
Use the product rule and the definition of negative exponents.
$(2x^{10}y^{-3})(9x^4y^{-7})=2\times9\times x^{10+4}\times y^{-3+(-7)}=18x^{14}y^{-10}=\frac{18x^{14}}{y^{10}}$
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.