Answer: [tex]\bold{b)\ \dfrac{-3\cdot a^7\cdot b^3\cdot b^1}{15\cdot a^2} }[/tex]
Step-by-step explanation:
Move the term that has a negative exponent to the other side of the fraction bar. This changes the negative exponent to a positive exponent.
[tex]\dfrac{-3\cdot a^{-2}\cdot b^3}{15\cdot a^{-7}\cdot b^{-1}}\\\\\\\text{move }a^{-2}\text{ to the bottom and }a^{-7}\text{ to the top. Change the sign of the exponent.}\\\\\dfrac{-3\cdot a^7\cdot b^3}{15\cdot a^2\cdot b^{-1}}\\\\\\\text{move }b^{-1}\text{ to the top. Change the sign of the exponent.}\\\\\dfrac{-3\cdot a^7\cdot b^3\cdot b^1}{15\cdot a^2}[/tex]
