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 Geometric mean

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So I have to fine the geometric mean of 3 and 15.  I know how to do that you just multiply them and then take the square root of that result and here is what I got - √45=6.7082039324993691

But my answer needs so be in this form - ?√?

How do I put it in that form?

 Jul 9, 2014

Best Answer 

 #1
avatar+33615 
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Look for the prime factors of 45.  These are 3*3*5  or 32*5.

This means √45 = √(32*5) = √(32)*√5 or 3√5

 Jul 9, 2014

1+0 Answers

 #1
avatar+33615 
+10
Best Answer

Look for the prime factors of 45.  These are 3*3*5  or 32*5.

This means √45 = √(32*5) = √(32)*√5 or 3√5

Alan Jul 9, 2014

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