Answer
$ x \geq 7$
Work Step by Step
You can not take the square root of a negative number. Therefore, x-7 must be greater than or equal to 0.
$ x-7 \geq 0$
We add 7 to both sides
$ x-7 + 7 \geq 0 + 7$
$ x \geq 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 - 10-5 Graphing Square Root Functions - Practice and Problem-Solving Exercises - Page 629: 9
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