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Review: Simplifying Radicals
Explanation
The two terms added under this square root cannot be
separated into square roots. That's a common error in dealing with radicals.
However, terms that are multiplied by each other can be separated into square
roots. And we can get two terms that are multiplied by each other by pulling
out a common factor.
Now we have two terms that are easy to simplify further:
So we get 
.
The correct answer is (B).
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