Question

Please Expand:
(a-b)^3

Answer 1

Answer:

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

Step-by-step explanation:

(a-b) ^3

=(a-b)*(a-b)*(a-b)

=(a-b)*(a^2-ba-ab+b^2)

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

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

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

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