Chapter 1 - Introduction to Algebraic Expressions - 1.8 Exponential Notation and Order of Operations - 1.8 Exercise Set - Page 67: 130

$\text{undefined}$

Substituting $ x $ with $ 2 $, then the given expression, $ \dfrac{x^2+2^x}{x^2-2^x} $, evaluates to \begin{array}{l}\require{cancel} \dfrac{2^2+2^2}{2^2-2^2} \\\\= \dfrac{4+4}{4-4} \\\\= \dfrac{8}{0} \\\\= \text{undefined} .\end{array}