Question

How to derive a formula of (a+b)³ and (a-b)³

Answer 1

Step-by-step explanation:

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

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

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

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

Answer 2

refer the attachment given above!!!