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diff --git a/3827/CH2/EX2.4/EX2_4.sce b/3827/CH2/EX2.4/EX2_4.sce
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+//EX2_4 Factor A + B'CD
+
+//clears the screen
+clc
+
+//clears already existing variables
+clear
+
+//This is of the form X + YZ
+disp('Let X = A , Y = B'' and Z = CD')
+disp('A + B''CD = X + YZ = (X + Y)(X + Z)')
+disp('A + B''CD = (A + B'')(A + CD)')
+//A + CD can be factored again using the second distributive law
+disp('A + B''CD = (A + B'')(A + C)(A + D)')