# Homework Help: Inverse laplace problem

1. Nov 26, 2005

### georgeh

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. Nov 26, 2005

### HallsofIvy

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?

3. Nov 26, 2005

### georgeh

yeah it does, thanks I got it.