SOLUTION: 4 over radical 5 plus radical2

Question 110630: 4 over radical 5 plus radical2

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Not sure if your problem is or
:
I'm also not sure what you want to do with this expression, but I'll assume that you want to rationalize the denominator.
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Let's try the second expression first. In order to rationalize (get the radicals out of) a denominator that is the sum (or difference) of two radicals, you need to remember the factoring rule for the difference of two squares.
:

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3 is a nice neat rational denominator, so all we have to do is multiply the expression by 1, in the form of
:

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If the problem is actually the first expression, then you need to multiply the first term by 1 in the form of , thus:
:

, then find a common denominator and add:

:
Hope that helps.

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