Answer
$\frac{56m^7}{n^5}$
Work Step by Step
Use the product rule and the definition of negative exponents.
$(8m^5n^{-1})(7m^2n^{-4})=8\times7\times m^{5+2}\times n^{-1+(-4)}=56m^7n^{-5}=\frac{56m^7}{n^5}$
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: 45
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