simplify: 16x^2y^5 over -4x^-6y^8
\(\dfrac{16x^2y^5}{-4x^{-6}y^8}=16:(-4)x^{2-(-6)}y^{5-8}=-4x^8y^{-3}=-\dfrac{4x^8}{y^3}\)Used:\(\dfrac{a^n}{a^m}=a^{n-m}\\\\a^{-n}=\dfrac{1}{a^n}\)
