> On Tuesday 05 June 2007 09:45, Alan G Isaac wrote: 
>> See section 8.2.7 of The LaTeX Companion 2nd edition, 
>> an indispensible aid to mathbook writing projects 
>> (and otherwise excellent). 

On Tue, 5 Jun 2007, Steve Litt apparently wrote: 
> I don't have that book -- I have Guide to LaTeX by Kopka 
> and Daly. Could you please point me to a web resource that 
> summarizes the ideas of  8.2.7 of The LaTeX Companion 
> pertaining to explanations after each line of a long 
> running equation group? 

\begin{align*}
f(x) &= x^{2} - 2x - 1 &&\text{quadratic polynomial}
\\
f(x) &= (x - 1)^{2}    &&\text{factor the quadratic}
\end{align*}

hth,
Alan Isaac




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