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#1 2005-09-17 21:42:17

tilly
Guest

Rationalising denominators.

hey, i was wondering if you could show me how to rationalise the denomiators on a couple of these, in easy steps.
1
----
√ 2

√ 2
------
3√ 3

√ 43 - √ 23
-------------
√ 43 + √ 23

#2 2005-09-17 23:01:07

MathsIsFun
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Re: Rationalising denominators.

As in getting rid of radicals in the denominator?


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

#3 2005-09-18 17:22:52

tilly
Guest

Re: Rationalising denominators.

yes, please help

#4 2005-09-18 18:02:26

MathsIsFun
Administrator

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Re: Rationalising denominators.

√ 2
------
3√ 3


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

#5 2005-09-18 20:44:37

tilly
Guest

Re: Rationalising denominators.

cheers

#6 2005-09-29 00:48:16

mathsyperson
Moderator

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Re: Rationalising denominators.

√43 - √23        √43 - √23     43 - 2√(43x23) + 23      66 - 2√989
------------- x  ------------ = ------------------------ =  -------------
√43 + √23       √43 - √23              43 - 23                      20

The math tag looks rather complex.


Why did the vector cross the road?
It wanted to be normal.

#7 2005-10-07 02:32:27

ramzi
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Re: Rationalising denominators.

Clever maths people, how do you deduce (-1) x (-1)= 1

#8 2005-10-07 08:00:07

MathsIsFun
Administrator

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Re: Rationalising denominators.

A baby taught us, see Multiplying Negatives


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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