This is probably a "basic" question, but I can't seem to remember how to do partial fractions problems where there is only a 1 in the numerator. For example (just making this up), let's say I have: 1/s(s+4)(s+5) So what I'd do is 1/s(s+4)(s+5) = A/s + B/(s+4) + C/(s+5) as one would expect, but this can't be right, correct? It seems a lot of coefficients don't "work out." For example, after doing cross multiplications and combining terms, you would basically get: For s^2 terms: (A+B+C) = 0  For s terms: (6A + 5B + 4C) = 0  For no-s terms: 5A = 1  Then putting --> , then getting B=-C - 1/5, and putting that in . You'll end up with A being equal to 1/5, and C being equal to -1/5. Plug this all into , so then that means B is equal to zero. What am I missing here? Is this right? Matlab says it should be C=-1 and B=1, which means that A is zero then? Huh? I am pretty confused. Thanks.