Answer
$add$, $25$.
Work Step by Step
As $x^2+10x+25=(x+5)^2$, the answers for the blanks are: $add$ the number $25$ (to be added).
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - 1.4 Circles - 1.4 Assess Your Understanding - Page 38: 1
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