Question

(a+b)whole cube - (a-b)whole cube

Answer 1

(A+B)^3= a^3+b^3+3ab(a+b)
(A-B)^3= a^3-b^3-3ab (a-b)
According to question
a^3+b^3+3a^2b+3ab^2-[a^3-b^3-3a^2b+3ab^2]
a^3+b^3+3a^2b+3ab^2-a^3+b^3+3a^2b-3ab^2
Now
2b^3+6a^2b answer
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Answer 2

Answer:2b^3+6a^2b

Step-by-step explanation:

(A+B)^3= a^3+b^3+3ab(a+b)

(A-B)^3= a^3-b^3-3ab (a-b)

According to question

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

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

Now

2b^3+6a^2b answer