here's the problem.

i don't know how to solve this (Shake), can you help me? thanks.

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- Mar 28th 2009, 03:45 AMprincess_21[SOLVED] roots
here's the problem.

i don't know how to solve this (Shake), can you help me? thanks.

- Mar 28th 2009, 04:21 AMearboth
- Mar 28th 2009, 04:39 AMprincess_21
- Mar 28th 2009, 06:19 AMearboth
I'll show you how to do the second question, but if I shall help you I must know what exactly is confusing you.

Ooooh, I finally found your question in the quoted calculations.

If you have then you can simplify

Apply similar transformations with all summands in the numerator and you'll get the next line of my calculations.

And now the 2nd question:

- Mar 28th 2009, 06:31 AMprincess_21
yes understand the second equation. I don't understand the first equation. My teacher told me that I need to change all the index so they can be combined. I change them all as fourth root by raising all square root to 2. is that correct?

- Mar 28th 2009, 06:39 AMearboth
- Mar 28th 2009, 06:50 AMprincess_21
http://www.mathhelpforum.com/math-he...4ef637fc-1.gif

Ok I got it. but I don't understand why - Mar 28th 2009, 06:57 AMearboth
- Mar 28th 2009, 07:26 AMprincess_21
yeah I got it thanks

I'll try to continue from here

is this correct? - Mar 28th 2009, 07:34 AMearboth
Honestly, I don't know what you did and why?

All my calculations were necessary to get a rational denominator. Thus I multiplied numerator and denominator by which I marked in red. That means I didn't change the value of the quotient.

The product of the numerator and is

which I simplified to

That's all. - Mar 28th 2009, 07:55 AMprincess_21

the two attachments are just one question the first one multiplied by the second one.

this is the original equation. I multiplied the answers.

- Mar 28th 2009, 08:01 AMearboth