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Homework Help: Inverse laplace problem

  1. Nov 26, 2005 #1
    i have the following problem
    (2s+2)/(s^2+2s+5)
    I am suppose to find the inverse laplace by putting in a form that i can find in a Laplace table, unfortunately the denominator does not factor!!... not sure how to procede.
     
    Last edited: Nov 26, 2005
  2. jcsd
  3. Nov 26, 2005 #2

    HallsofIvy

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    Science Advisor

    Try completing the square. s2+ 2s+ 5= s2+ 2s+ 1+ 4= (s+1)2+ 4. Do you have a entry in your table that involves s2+ a2 in the denominator?
    Can you write 2s+ 2 as 2(s+1)+ b?

    Does your table of inverse Laplace transforms have a suggestion if you have (s+ a) instead of s?
     
  4. Nov 26, 2005 #3
    yeah it does, thanks I got it.
     
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