Answer
$\frac{5}{x^4}$
Work Step by Step
We start with the given expression: $5x^{-4}$
The negative exponent rule states that for every nonzero number $a$ and integer $n$, $a^{-n}=\frac{1}{a^n}$.
We use this rule to rewrite the expression as $\frac{5}{x^4}$.