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+//Ex19_31 Pg-999
+clc
+
+disp("LHS : (A+ C)(A'' + B) ")
+disp("         = AA'' + AB + CA'' + BC") //using distributive law
+disp("         = 0 + AB + CA'' + BC") //using law 8
+disp("         = AB + (A + A'')BC + CA''") //using law 7
+disp("         = AB + ABC + A''BC + CA''") 
+//using distributive law
+disp("         = AB + ABC + A''C(B + 1)") 
+//taking common A'C from A'BC + CA'
+disp("         = AB + ABC + A''C") //using law 3
+disp("         = AB(C + 1)+ A''C") 
+//taking common AB from AB + ABC
+disp("         = AB + A''C") //using law 3
+disp("Therefore (A+ C)(A'' + B) = AB + A''C")