## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$\dfrac{b^{7}}{a^{5}}$
Using the laws of exponents, the given expression, $\dfrac{a^{-5}}{b^{-7}}$, is equivalent to \begin{array}{l}\require{cancel} \dfrac{b^{7}}{a^{5}} .\end{array}