[tex] \frac{1}{x^{21}y^{12}} [/tex]Simplify within ... remember to subtract exponents when dividing
[tex]x^{-3-4}=x^{-7}[/tex] ← simplifying x
[tex]y^{2-6}=y^{-4}[/tex] ← simplifying y
[tex]( \frac{(x^{-3})(y^{2})}{(x^4)(y^6)})^3=(x^{-7})^3(y^{-4})^3=x^{-21}y^{-12}[/tex]
Negative exponents require you to flip the base if you want a positive exponent.
The correct answer is B
[tex] \frac{1}{ x^{21} y^{12} } [/tex]
