SOLUTION: Rationalize the denominator if necessary. Then simplify each radical expression. Could someone help me I am unable to solve this expression. {{{(6-sqrt(20))/2}}}

Question 98188: Rationalize the denominator if necessary. Then simplify each radical expression. Could someone help me I am unable to solve this expression.

Answer by Edwin McCravy(20055) (Show Source): You can put this solution on YOUR website!
Rationalize the denominator if necessary. Then simplify each radical expression. Could someone help me I am unable to solve this expression.

Its denominator is already rational
(contains no roots). So all we can do
is simplify:
Write as

Now write the as

Take individual square roots:

Since = , we have

Now let's make two fractions by putting
each of the terms over the denominator:

Then simplify to:

Edwin

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