How to Simplify and Solve the Inverse Laplace Transform of 1/(s^2+s-20)?

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jtruth914
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Having difficulty with L-1 {1/(s^2+s-20)}:

Should I make it L-1 {1/(s+5)(s-4)}? I'm stuck.
 
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Here is a hint. Split [itex]\frac{1}{(s+5)(s-4)}[/itex] into [itex]\frac{A}{s+5}+\frac{B}{s-4}[/itex].
 

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