# Laplace Transforms

#### full

Joined May 3, 2014
225
Hello again

thanks for help

I do another problem but I don't know how will complete my solution

thanks

#### full

Joined May 3, 2014
225
again the question in part #4
I stop on partial function ,so there is the question is complex number ,what I will do?

#### WBahn

Joined Mar 31, 2012
26,398
Full, in the future, please keep it to one problem per thread. Invariably you are going to get people responding to the one problem mixed who aren't even aware that there is more than one and it will get utterly confusing.

I'll ask the mods to split this off into a new thread.

#### simo_x

Joined Dec 23, 2010
200
again the question in part #4
I stop on partial function ,so there is the question is complex number ,what I will do?
There is a basic rule for factoring a function into partial fraccion with the denominator having complex roots.
Take a look at this.

However I do not understand your last step:

$$\left( {\not{(1+s)^2 + 6} \over (1+s)^2 + 4} \right )\left({1 \over \not{(1+s)^2 + 4}}\right )$$

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