Answer
$x\geq-3$
Work Step by Step
$3x+9$ must be greater than or equal to 0 because a negative number does not have a square root.
$3x+9\geq0$
Simplify to get $3x\geq-9$
Divide both sides by 3 to get:
$x\geq-3$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 10 - Radical Expressions and Equations - 10-5 Graphing Square Root Functions - Practice and Problem-Solving Exercises - Page 642: 14
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