Question

1)(a+3)=

2)(a+-B)^2=a^2+-2AB+B^2

3)(a+-B)^3=

Answer 1

1)(a+3)=a+3

2)(a+-B)^2=a^2+-2AB+B^2

3)(a+-B)^3=(a+b)3=a3+3a2b+3ab2+b3

       

Answer 2

(a±b)^3=a^3 ± 3a^2b + 3ab^2 ± b^3