diff --git a/Calculo II/8_4.org b/Calculo II/8_4.org
index eea4780..afc3ff6 100644
--- a/Calculo II/8_4.org	
+++ b/Calculo II/8_4.org	
@@ -54,10 +54,19 @@ $q(x) \neq 0$
 
 \begin{center}
 $g(x) = \frac{2x^4 - x^2 - 1}{x^2 - 4}$
+
+$x^2 -4 = 0$
+
+$x^2 = 4$
+
+$x = \pm \sqrt{4}$
+
+$x = \pm 2$
 \end{center}
 
 El dominio de g(x) son:
 dom_g = \Re - {2, -2}
 
+
 * Fuente
 - Ejercicios material de la clase UAI ultra
diff --git a/Calculo II/8_4.pdf b/Calculo II/8_4.pdf
index 1a6ce57..d8fc3f2 100644
Binary files a/Calculo II/8_4.pdf and b/Calculo II/8_4.pdf differ