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%
% Copyright (C) 2018, 2019, 2020 by 
% Anna Capietto, Sandro Coriasco, Boris Doubrov, Alexander Koslovski,
% Tiziana Armano, Nadir Murru, Dragan Ahmetovic, Cristian Bernareggi
%
% Based on accsupp and tagpdf
%
% This work consists of the main source files axessibility.dtx and axessibility.lua,
% and the derived files
%   axessibility.ins, axessibility.sty, axessibility.pdf, README,
%   axessibilityExampleSingleLineT.tex, axessibilityExampleSingleLineA.tex,
%.  axessibilityExampleAlignT.tex, axessibilityExampleAlignA.tex
% 
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is 
%               Sandro Coriasco
%

\documentclass[a4paper,11pt]{article}

\usepackage{axessibility}

\title{Algebraic equations of second degree:\\
relation between roots and coefficients}
\author{}
\date{}


\begin{document}



\maketitle


\tagstructbegin{tag=P}
  \tagmcbegin{tag=P}
Given the equation \auxiliaryspace
  \tagmcend
\tagstructend
 \( a x^2 + bx + c= 0, a\not=0 \), 
\tagstructbegin{tag=P}
  \tagmcbegin{tag=P}
 we have the following relations between its roots \auxiliaryspace
  \tagmcend
\tagstructend
 \( x_{1,2} \):

\begin{align*}
x_1+x_2 & = -\frac{b}{a},\\
   x_1\cdot x_2 &= \phantom{-}\frac{c}{a}.
\end{align*}



\end{document}