SOLUTION: Hello there, I am currently working on an optional summer packet for school, and I came across this problem. I have the answer available to me, but I don't understand how to get t

Question 149990: Hello there,
I am currently working on an optional summer packet for school, and I came across this problem. I have the answer available to me, but I don't understand how to get the answer. If you could explain to me how to simplify this expression, I'd greatly appreciate it.

Thank you!
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
As a reminder, let's review a basic rule of square roots:

Then, I can factor the 4 as:

If you see a "pair" of terms, you can you can "pull it out" thus:

.
For your problem then:

Notice, the pair of "4's", "y's", and "x^2".

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