Agregue binomio conjugado.

src/d1-02-extras.tex

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+\documentclass{article}
+
+\usepackage[utf8]{inputenc}
+\usepackage[dvipsnames]{xcolor}
+\usepackage{tikz}
+
+
+% -- Cuerpo del documento
+\begin{document}
+	\section{Ejemplo}
+	
+	\begin{figure}[h!]
+	\centering
+	\begin{tikzpicture}
+        \draw[thick, OliveGreen, fill=OliveGreen!25] (0, 0) rectangle (3, 3);
+        \node at (1.5, 1.5) {$a^2$};
+
+        \draw[thick, OliveGreen, fill=OliveGreen!25] (3, 3) rectangle (4, 4);
+        \node at (3.5, 3.5) {$b^2$};
+
+        \draw[thick, OliveGreen, fill=OliveGreen!10] (0, 3) rectangle (3, 4);
+        \node at (1.5, 3.5) {$ab$};
+
+        \draw[thick, OliveGreen, fill=OliveGreen!10] (3, 0) rectangle (4, 3);
+        \node at (3.5, 1.5) {$ab$};
+
+		\draw[|-|] ( 0,-0.5) to node[fill = white] {$a$} ( 3,-0.5);
+		\draw[|-|] ( 3,-0.5) to node[fill = white] {$b$} ( 4,-0.5);
+		\draw[|-|] ( -0.5, 0) to node[fill = white, rotate=90] {$a$} ( -0.5, 3);
+		\draw[|-|] ( -0.5, 3) to node[fill = white, rotate=90] {$b$} ( -0.5, 4);
+	\end{tikzpicture}
+	\caption{Representacion grafica del binomio cuadrado.}	
+	\end{figure}
+
+	\begin{figure}[h!]
+	\centering
+	\begin{tikzpicture}
+        \def\myColor {NavyBlue}
+        \def\A {3}
+        \def\B {1}
+
+        \draw[dashed, gray] (0, 0) rectangle +(\A, \A);
+        \draw[dashed, gray] (\A - \B, 0) rectangle +(\B, \A - \B);
+
+        \draw[thick, \myColor, fill=\myColor!25]
+            (0, 0) rectangle +(\A - \B, \A);
+        \node at (0.5*\A - 0.5*\B, 0.5*\A) {$A_2$};
+
+        \draw[thick, \myColor, fill=\myColor!25]
+            (0, \A) rectangle +(\A - \B, \B);
+        \node at (0.5*\A - 0.5*\B, \A + 0.5*\B) {$A_2$};
+
+        \draw[|-|] (0, -0.25) to node[fill=White] {$a$} (\A, -0.25);
+        \draw[|-|] (\A - \B, -0.5) to node[fill=White] {$b$} (\A, -0.5);
+
+        \draw[|-|] (-0.5, 0) to node[fill=White] {$a$} (-0.5, \A);
+        \draw[|-|] (-0.5, \A) to node[fill=White] {$b$} (-0.5, \A + \B);
+        
+
+	\end{tikzpicture}
+	\caption{Binomio conjugado}	
+	\end{figure}
+	
+\end{document}
+