Teacher2Teacher |
Q&A #849 |
From: Derek
To: Teacher2Teacher Public Discussion
Date: 2009091019:53:56
Subject: Re: Factoring the sum and difference of two cubes
A great way to motivate this is to use synthetic division. For example: x^3-8=0 must have a zero of 2. When we synthetically divide by 2, we get 1 2 4, so x^3-8=(x-2)(x^2+x+4). Doing a couple more examples should make the pattern clear. It can also be generalized by synthetically dividing x^3-a^3 by a (one of its zeros).
Post a reply to this message
Post a related public
discussion message
Ask Teacher2Teacher a new question
[Privacy Policy] [Terms of Use]
Math Forum Home ||
The Math Library ||
Quick Reference ||
Math Forum Search