Answer
See the explanation
Work Step by Step
For squaring $\sqrt x+2$, the one should use formula $(a+b)^2=a^2+2ab+b^2$ and for squaring $\sqrt{x+2}$, just the square root will be removed.
$$(\sqrt x+2)^2=x+2\sqrt x+4$$
$$(\sqrt{x+2})^2=x+2$$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 10 - Radical Functions and Equations - 10.3 - Solving Radical Equations - Exercises - Page 566: 72
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