Answer
$\text{radicand: }
p^2+4
\\\text{index: }
2
$
Work Step by Step
The radicand and the index of the given expression, $
5\sqrt{p^2+4}
,$ are
\begin{array}{l}
\text{radicand: }
p^2+4
\\\text{index: }
2
.\end{array}
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