Answer
$x=-7$
Work Step by Step
$x^2+14x+49=0$
$(x+7)^2=0$
$\sqrt {(x+7)^2}=\sqrt 0$
$x+7 = 0$
$x=-7$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-3 Operations with Radial Expressions - Mixed Review - Page 618: 81
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