diff --git a/2nd/10_Factorisation_et_identites_remarquables/1E_factorisation.pdf b/2nd/10_Factorisation_et_identites_remarquables/1E_factorisation.pdf
index f2a9984..9f75696 100644
Binary files a/2nd/10_Factorisation_et_identites_remarquables/1E_factorisation.pdf and b/2nd/10_Factorisation_et_identites_remarquables/1E_factorisation.pdf differ
diff --git a/2nd/10_Factorisation_et_identites_remarquables/exercises.tex b/2nd/10_Factorisation_et_identites_remarquables/exercises.tex
index 0de539f..de28817 100644
--- a/2nd/10_Factorisation_et_identites_remarquables/exercises.tex
+++ b/2nd/10_Factorisation_et_identites_remarquables/exercises.tex
@@ -125,7 +125,7 @@
     Factoriser les expressions suivantes quand c'est possible
     \begin{multicols}{4}
         \begin{enumerate}[label={\Alph* = }]
-            \item $4x^2 + 2x + 1$
+            \item $4x^2 + 4x + 1$
             \item $16x^2 - 1$
 
             \item $x^2 - 4x + 4$
@@ -148,7 +148,7 @@
             \item $(4x-2)^2 = 0$
 
             \item $16x^2 - 1 = 0$
-            \item $4x^2 + 2x + 1 = 0$
+            \item $4x^2 + 4x + 1 = 0$
 
             \item $9x^2 - 6x + 1 = 0$
             \item $x^2 - 16 = 0$