mathURL

http://mathurl.com/34erol5
<img src="http://mathurl.com/34erol5.png" />

$\frac{p_{1}^{2} - p_{2}^{2}}{p_{1} - p_{2}} = p_{1} + p_{2} $ (where p_{1} - p_{2} \neq 0)$

help & about · blog · mathurl at mathurl dot com · by justin kao