(a+b)^3
(a+b) whole cube
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( a + b ) ³ = a³ + b³ + 3ab( a + b ) = a³ + b³ + 3a²b + 3ab²
Proof :-
( a + b )³ = ( a + b )( a + b )( a + b )
= ( a² + b² + 2ab )( a + b )
= a³ + ab² + 2a²b + a²b + b³ + 2ab²
= a³ + b³ + 3a²b + 3ab²
✔✔✔✔✔
Proof :-
( a + b )³ = ( a + b )( a + b )( a + b )
= ( a² + b² + 2ab )( a + b )
= a³ + ab² + 2a²b + a²b + b³ + 2ab²
= a³ + b³ + 3a²b + 3ab²
✔✔✔✔✔
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