Quote Originally Posted by thedoge View Post
on 3...

I have it to
<br /> X(s) = \frac{-13s^3+4s-36}{s^2(s^2+13)}<br />

Now do I do partial fractions like this?
<br /> X(s) = \frac{Ax+B}{s^2} + \frac{Cx+D}{s^2+13}<br />
The correct form should be

\frac{-13s^3+4s-36}{s^2(s^2+13)}=\frac{A}{s}+\frac{B}{s^2}+\frac{C s+D}{s^2+13}