(A- B)2 = A2 – 2AB + B2 6. A3 + B3 = (A + B)( A2 – AB + B2)

2. (A- B)

2

= A

2

– 2AB + B

2

6. A

3

+ B

3

= (A + B)( A

2

– AB + B

2

)