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
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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)