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#1 2009-08-23 16:14:16

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,560

Difference of Two Cubes

A (rather too short) page on the Difference of Two Cubes


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

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#2 2009-08-23 22:13:48

bobbym
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From: Bumpkinland
Registered: 2009-04-12
Posts: 96,644

Re: Difference of Two Cubes

Hi MathsisFun;

It does some nifty expansions like:

calling a= 5x and b =2

So numbers like 15617 which equal 25^3 - 2^3 can be factored  but not always into primes.

15617 = (23)(679)


In mathematics, you don't understand things. You just get used to them.

If it ain't broke, fix it until it is.

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