It is currently 27 Jun 2017, 07:42

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# (a^3 + b^3 + c^3)

Author Message
TAGS:

### Hide Tags

Intern
Joined: 07 Jan 2013
Posts: 5
(a^3 + b^3 + c^3) [#permalink]

### Show Tags

07 Jul 2013, 23:46
1
This post was
BOOKMARKED
Is there any shortcut on how to quickly simplify this expression (a^3 + b^3 + c^3) into this form (a+b+c)(a^2+b^2+c^2-ab--bc-ac)+3abc
Math Expert
Joined: 02 Sep 2009
Posts: 39719
Re: (a^3 + b^3 + c^3) [#permalink]

### Show Tags

07 Jul 2013, 23:56
jobeto12 wrote:
Is there any shortcut on how to quickly simplify this expression (a^3 + b^3 + c^3) into this form (a+b+c)(a^2+b^2+c^2-ab--bc-ac)+3abc

Easier to memorize that $$a^2+b^3+c^3=(a+b+c)(a^2+b^2+c^2-ab-bc-ac)+3abc$$.
_________________
Director
Affiliations: GMATQuantum
Joined: 19 Apr 2009
Posts: 598
Re: (a^3 + b^3 + c^3) [#permalink]

### Show Tags

09 Jul 2013, 00:47
Factorization of expressions involving cubic terms is outside the scope of GMAT quantitative. I have not seen a single official question that requires such factorization and I am pretty certain that these types of problems would not be tested on the GMAT.

Dabral
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 16002
Re: (a^3 + b^3 + c^3) [#permalink]

### Show Tags

16 Apr 2015, 17:44
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: (a^3 + b^3 + c^3)   [#permalink] 16 Apr 2015, 17:44
Similar topics Replies Last post
Similar
Topics:
2 How to prove that for (a^3)*(b^2)=2000, a and b can only be 5 and 4 3 09 May 2017, 15:18
Display posts from previous: Sort by