http://img32.imageshack.us/img32/945/howx.jpg

Can anyone explain to me what happened here?

I understand that the 2 on the bottom is cause the denominator has to be the same, but I don't understand what happened on top.

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- Jul 21st 2009, 09:03 PMazurephantomAdding square roots (easy question)
http://img32.imageshack.us/img32/945/howx.jpg

Can anyone explain to me what happened here?

I understand that the 2 on the bottom is cause the denominator has to be the same, but I don't understand what happened on top. - Jul 21st 2009, 09:10 PMRapha
- Jul 21st 2009, 09:11 PMAlephZero