Answer
$\frac{30x^9}{y^6}$
Work Step by Step
Use the product rule and the definition of negative exponents.
$(3x^{20}y^{-1})(10x^{-11}y^{-5})=3\times10\times x^{20+(-11)}\times y^{-1+(-5)}=30x^9y^{-6}=\frac{30x^9}{y^6}$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Appendix B - Exercise Set - Page 742: 67
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