GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 15 Oct 2019, 16:48

### 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

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

Author Message
TAGS:

### Hide Tags

Intern
Joined: 07 Jan 2013
Posts: 5
GMAT 1: 720 Q48 V38
(a^3 + b^3 + c^3)  [#permalink]

### Show Tags

07 Jul 2013, 23:46
1
1
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: 58340
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: 600
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
Non-Human User
Joined: 09 Sep 2013
Posts: 13167
Re: (a^3 + b^3 + c^3)  [#permalink]

### Show Tags

28 Jan 2018, 23:58
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] 28 Jan 2018, 23:58
Display posts from previous: Sort by