Solving Math Problems Step-by-Step for Beginners

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hey . i need help . look at the pic .( please tell me step by step because i am little dumb in math )

[url=http://hh7.net/][PLAIN]http://hh7.net/June2/hh7.net_13074510661.png[/url][/PLAIN]
 
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Divide s^2+2s+5 over and then inverse Laplace transform if you can. You're not that far from a solution. The tricky part is doing the inverse Laplace transform.
 
Thank you very much
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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