Question

write the definition of the identity and prove that bracket me a + b ka whole cube is equal to a cube plus b cube + 3 ABC bracket me a + b bracket close​

Answer 1

Step-by-step explanation:

(a+b)^3

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

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

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

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

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

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