#### Answer

$8$

#### Work Step by Step

The given expression, $
\sqrt{51+13}
,$ simplifies to
\begin{array}{l}\require{cancel}
\sqrt{64}
\\\\=
\sqrt{(8)^2}
\\\\=
8
.\end{array}

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

$8$

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