info prev up next book cdrom email home

Trinomial Identity


\begin{displaymath}
(x^2+axy+by^2)(t^2+atu+bu^2)=r^2+ars+bs^2,
\end{displaymath} (1)

where
$\displaystyle r$ $\textstyle =$ $\displaystyle xt-byu$ (2)
$\displaystyle s$ $\textstyle =$ $\displaystyle yt+xu+ayu.$ (3)




© 1996-9 Eric W. Weisstein
1999-05-26