## Introductory Algebra for College Students (7th Edition)

The given expression, $\sqrt{25-144} ,$ simplifies to \begin{array}{l}\require{cancel} \sqrt{-119} .\end{array} Since the index of the given expression, $\sqrt{-119} ,$ is even (index = $2$) and the radicand is negative (radicand = $-119$), then the given expression is $\text{ not a real number .}$