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The product

  1. Aug 26, 2004 #1
    well i could not get anything really mibd boggling, so u will have to put up with this one

    what is the product of:

    (x-a)(x-b)(x-c).................. = ?
     
  2. jcsd
  3. Aug 26, 2004 #2

    cepheid

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    [tex] (x^2 - bx - ax + ab)(x-c) [/tex]

    [tex] = x^3 - cx^2 - bx^2 + cbx - ax^2 +cax + abx - cab [/tex]

    What the hell was the point? Basic algebra, without even a nice expansion.

    EDIT *sigh*, yeah ok, had to collect terms, it looked so bad otherwise:

    [tex] = x^3 - (a+b+c)x^2 + (ab + ac + bc)x - abc [/tex]
     
    Last edited: Aug 26, 2004
  4. Aug 26, 2004 #3

    Pi

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    Haha, haven't seen that one in a long time :rofl:

    (x - a)(x - b) ... (x - x)(x - y)(x - z) = 0

    since x - x = 0
     
  5. Aug 30, 2004 #4
    what in the world was cepheid trying to do?

    next time try to read carefully.
     
  6. Aug 30, 2004 #5
    vilkasj007, u should have written it more clearly. something like this:
    (x-a)(x-b)...(x-y)(x-z) = ?
     
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