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Transform to system of first order equations

  1. May 4, 2008 #1
    1. The problem statement, all variables and given/known data
    u'''-8u''+2u'-3u=0


    2. Relevant equations



    3. The attempt at a solution
    So I let:
    x1 = u
    then x1' = u'
    x2 = u'
    then x1' = x2
    and x2' = u''
    x3 = u''
    then x2' = x3
    and x3' = u'''

    I have only done these problems with second order equations, so I don't understand which values I am supposed to plug back into the original equation. Any help is appreciated! Thanks!
     
  2. jcsd
  3. May 4, 2008 #2

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