# Math Help - Quick Laurent Series question

1. ## Quick Laurent Series question

Hi
Just to clarify something
If the given question was to find the Laurent Series of $\frac{1}{z^2-7z+10}$ would you find the valid regions by using $\frac{1}{z-2} + \frac{1}{z-5}$ or use the partial expansion form $\frac{1}{3(z-5)}- \frac{1}{3(z-2)}$

P.S

2. ## Re: Quick Laurent Series question

Originally Posted by Paymemoney
Hi
Just to clarify something
If the given question was to find the Laurent Series of $\frac{1}{z^2-7z+10}$ would you find the valid regions by using $\frac{1}{z-2} + \frac{1}{z-5}$ or use the partial expansion form $\frac{1}{3(z-5)}- \frac{1}{3(z-2)}$

P.S
The latter.