This is a problem that i'm not sure if i finished it or does it still got more steps? thanks

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- Sep 10th 2008, 01:26 PMxJenniferxRationalizing the Denominator
This is a problem that i'm not sure if i finished it or does it still got more steps? thanks

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http://img235.imageshack.us/my.php?i...1076157en5.png - Sep 10th 2008, 01:39 PMMoo
- Sep 10th 2008, 01:42 PMxJenniferx
so i stop at 4 / xy and forget the (2)(2)/xy?

- Sep 10th 2008, 01:44 PMNox
I don't think you needed to reduce 4 to "(2)(2)," but that's right for the most part. You did forget the $\displaystyle \sqrt{xy}$ in the numerator, though.

Have you talked about absolute values yet in class? If so, think of how $\displaystyle \sqrt{x^2}$ isn't exactly the same as $\displaystyle x$. If you haven't gotten that far yet in your class, never mind; you did it just fine. - Sep 10th 2008, 01:44 PMMoo
- Sep 10th 2008, 01:46 PMxJenniferx
if we did do absolute value what do i need to change? can't find where i will have to do with x^2

- Sep 10th 2008, 01:54 PMMoo
- Sep 10th 2008, 01:57 PMNox
EDIT: Moo's right. Haha. Neither $\displaystyle x$ nor $\displaystyle y$ could be negative (technically,

*both*could be negative... but they'd cancel out in the last step), so absolute value signs are redundant. - Sep 10th 2008, 01:58 PMMoo
- Sep 10th 2008, 02:03 PMNox
I know. :P I just didn't think of it before. See the EDIT.