All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Just Math
Integer Roots (Posted on 2006-10-14) Difficulty: 2 of 5
Find all integers n for which the equation x3 - 13x + n = 0 has three integer roots.

See The Solution Submitted by Bractals    
Rating: 2.5000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts re(2): Some thoughts Comment 5 of 5 |
(In reply to re: Some thoughts by Richard)

Oops, that's what comes from working online... Having p+pq+q=13 allows p=1 and q=3 (or viceversa), producing roots 1, 3, and -4; p=-1 and q=-3 produces -1, -3, and 4 as roots.
  Posted by Federico Kereki on 2006-10-15 12:42:03

Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (4)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2018 by Animus Pactum Consulting. All rights reserved. Privacy Information