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Old 02-24-2009, 05:39 PM
VictorZamora VictorZamora is a male United States VictorZamora is online now
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So, does anyone know about rationalizing denominators?

I need help
What's the square root of 5 over twenty 5 simplified??
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Old 02-24-2009, 05:41 PM
Danger Nauru Danger is online now
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Re: So, does anyone know about rationalizing denominators?

sqrt(5) over 25 = 0.0894427191
or
1/11.1803399
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Last Edited by Danger; 02-24-2009 at 05:42 PM. Reason: Reply With Quote
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Old 02-24-2009, 05:42 PM
VictorZamora VictorZamora is a male United States VictorZamora is online now
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Re: So, does anyone know about rationalizing denominators?

Quote:
Originally Posted by fratey View Post
sqrt(5) over 25 = 0.0894427191
lol, thanks. but i can't have it in decimal form.
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Old 02-24-2009, 05:44 PM
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Re: So, does anyone know about rationalizing denominators?

Check the edit
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Old 02-24-2009, 05:44 PM
VictorZamora VictorZamora is a male United States VictorZamora is online now
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Re: So, does anyone know about rationalizing denominators?

Quote:
Originally Posted by fratey View Post
Check the edit
oh, ok
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Old 02-24-2009, 07:23 PM
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Re: So, does anyone know about rationalizing denominators?

Quote:
Originally Posted by fratey View Post
sqrt(5) over 25 = 0.0894427191
or
1/11.1803399
Both are invalid for rationalizing a fraction.

You cannot have decimals in fractions. At least, not if you don't want to be yelled at.


Just to check, the formula is (5^(1/2))/25? If so, the denominator has already been rationalized. If you want to rationalize the numerator, that's a bit different.
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Last Edited by John; 02-24-2009 at 07:25 PM. Reason: Reply With Quote
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Old 02-24-2009, 07:54 PM
mmmmm_PIE mmmmm_PIE is a male Canada mmmmm_PIE is online now
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Re: So, does anyone know about rationalizing denominators?

Quote:
What's the square root of 5 over twenty 5 simplified??
√5 / 25

Write numerator and denominator in terms of a common base (let's use 5)

= 5^(1/2) / 5^2

In division, subtract the exponent in the denominator from the exponent in the numerator

= 5^(1/2 - 2)
= 5^(-3/2)

As John pointed out, this simplification is not an example of rationalizing the denominator, though I see where you might be confused.
Last Edited by mmmmm_PIE; 02-24-2009 at 07:54 PM. Reason: Reply With Quote
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