Question

pls give detail solution​

Answer 1

Answer:

=a^3 + 3a^2b + 3ab^2+ b^3-(a^3 - 3a^2b + 3ab^2- b^3)

=a^3 + 3a^2b + 3ab^2+ b^3-a^3 + 3a^2b - 3ab^2 + b^3

=2b^3+6a^2b is the correct answer.