A^2 - B^2 = (A - B)(A + B)

1 (A + B)^2 = A^2 + 2AB + B^2 

2 (A - B)^2 = A^2 - 2AB + B^2 

3 A^2 - B^2 = (A - B)(A + B) 

4 (A + B)^3 = A^3 + 3A^2B + 3AB^2 + B^3 

5 (A - B)^3 = A^3 - 3A^2B + 3AB^2 - B^3 

6 A^3 + B^3 = (A + B)(A^2 - AB + B^2) 

7 A^3 - B^3 = (A - B)(A^2 + AB + B^2) 

8 Chap 9 

9 chap 8 

10 Chap 10 

11 Chap 11 

12 Chap 12 

13 Chap 13 

14 Chap 14 

15 Chap 15 

16 Chap 16 

17 Chap 17 Mộng của Martin 

18 Nam định 

19 Chap 19 

20 Chap 20 

21 Chap 21 

22 Chap 22 

23 Chap 23 

24 Chap 24 

25 Chap 25 

26 Chap 26 

27 Chap 27 

28 Chap 28 

29 Chap 29 

30 Chap 30 

31 Chap 31 

32 Chap 32 

33 Chap 33 

34 Chap 34 

35 Chap 35 

36 Thanh Hóa 

37 Chap 37 

38 Chap 38 

39 Chap 39 

40 Chap 40 

41 Chap 41 