Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 24 May 2017, 09:59

### 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

# how to prove this ?

Author Message
Intern
Joined: 25 Mar 2008
Posts: 43
Followers: 0

Kudos [?]: 5 [0], given: 0

how to prove this ? [#permalink]

### Show Tags

07 Dec 2009, 19:53
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

When a + b + c = 0, then a^3 + b^3 + c^3 = 3abc

how to prove this ?
Senior Manager
Joined: 30 Aug 2009
Posts: 286
Location: India
Concentration: General Management
Followers: 3

Kudos [?]: 171 [0], given: 5

Re: how to prove this ? [#permalink]

### Show Tags

07 Dec 2009, 20:23
ghentu wrote:
When a + b + c = 0, then a^3 + b^3 + c^3 = 3abc

how to prove this ?

a^3 + b^3 + c^3 - 3abc = ( a + b + c )(a^2 +b^2 +c^2 -ab-bc-ac). now if ( a + b + c ) =0 then we get a^3 + b^3 + c^3 = 3abc
Re: how to prove this ?   [#permalink] 07 Dec 2009, 20:23
Display posts from previous: Sort by