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

$-4x^5y^3$
Cancel the coefficients' common factors and simplify the variables uising the quotient rule for exponents $(\frac{a^m}{a^n}=a^{m-n}, a\ne0)$ to obtain: $\require{cancel} =-\dfrac{25(4)}{25}x^{6-1}y^{8-5} \\=-\dfrac{\cancel{25}(4)}{\cancel{25}}x^{5}y^{3} \\=-4x^5y^3$