Question

(a+b)*3



find this formula​

Answer 1

Question:

____________

(a+b)*3

find this formula

Formula:

___________

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

Formulation:

________________

(a+b)*3

(a+b)(a+b)(a+b)

[(a+b)(a+b)] (a+b)

[a(a+b)+b(a+b)] (a+b)

[a^2 + ab + ab + b^2] (a+b)

[a^2 + b^2 + 2ab] ( a + b )

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

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

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

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