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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}