Rationalizing Denominators  TOPIC_SOLVED

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.

Rationalizing Denominators

Postby pieldevereda on Fri Mar 11, 2011 6:34 pm

Hi, I can 't resolve this exercise

Image

Uploaded with ImageShack.us

I have the result, but i don 't why is that

Thanks

Regards
pieldevereda
 
Posts: 6
Joined: Fri Mar 11, 2011 2:25 pm

Sponsor

Sponsor
 

Postby stapel_eliz on Sat Mar 12, 2011 1:42 am

pieldevereda wrote:



I have the result, but i don 't why is that

To learn how to rationalize denominators, try here.

Note: You might find it helpful to simplify the denominator first. Then cancel, and then rationalize. :wink:
User avatar
stapel_eliz
 
Posts: 1715
Joined: Mon Dec 08, 2008 4:22 pm

Re: Rationalizing Denominators  TOPIC_SOLVED

Postby bill_milstead on Sat Mar 12, 2011 5:13 am

Hello, to rationalize the denominator, you want to get rid of the radical at the bottom by mulitplying the top and the bottom by "1". The key to this problem is to notice the index of "6". If you attempted to solve it by using just the with an index of "2" you would get a different answer.

Let's first get our number "1"

=

* =

Now we need to rationalize the denominator

=

The last step is to simplify the answer

=

Divide out the "y" and you should end up with your answer.



Hope this helps.
bill_milstead
 
Posts: 2
Joined: Fri Mar 11, 2011 4:48 am
Location: Saint Leonard, MD, USA

Re: Rationalizing Denominators

Postby bill_milstead on Sat Mar 12, 2011 6:26 am

Oops...my bad, I should have given hints and not shown the whole problem. Sorry about that. I'm new on here and won't do that again. Though, there is typically more than one way to solve a problem. I highly encourage you to attempt simplifying the problem first and then solving it.
bill_milstead
 
Posts: 2
Joined: Fri Mar 11, 2011 4:48 am
Location: Saint Leonard, MD, USA

Re: Rationalizing Denominators

Postby pieldevereda on Sat Mar 12, 2011 8:33 am

Hi stapel_eliz and bill_milstead, thank you for your answers, really thank you very very much!!
Regards
pieldevereda
 
Posts: 6
Joined: Fri Mar 11, 2011 2:25 pm


Return to Intermediate Algebra