% % 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}