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Repeated Root Research (Posted on 2006-05-08) Difficulty: 3 of 5
If I told you a certain polynomial P(x) had a double root (only one!), how could you go about finding it, WITHOUT trying to find every root? Also, the EXACT value of the root is sought; not an approximation.

NB. Roots may be any kind --real or complex-- but they are all different, with multiplicity "1", except for one that has multiplicity "2".

See The Solution Submitted by Old Original Oskar!    
Rating: 3.6667 (3 votes)

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Complex not possible | Comment 5 of 6 |
You can't have exactly one complex root with multiplicity 2, its conjugate will also have multiplicity 2.
  Posted by Jer on 2006-05-09 13:14:57
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