# How do you simplify x^-4 and write it using only positive exponents?

##### 1 Answer
Sep 4, 2017

Use this rule of exponents:

${x}^{\textcolor{red}{a}} = \frac{1}{x} ^ \textcolor{red}{- a}$

${x}^{\textcolor{red}{- 4}} = \frac{1}{x} ^ \textcolor{red}{- - 4} = \frac{1}{x} ^ 4$