Simplify (3x^-4)/(y^-2)

$\frac{3 x^{- 4}}{y^{- 2}}$

Move $x^{- 4}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{3}{y^{- 2} x^{4}}$

Move $y^{- 2}$ to the numerator using the negative exponent rule $\frac{1}{b^{- n}} = b^{n}$ .

$\frac{3 y^{2}}{x^{4}}$