Question

$(a + b)3$
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Answer 1

${a}^3 + {b}^3 + 3ab(a + b)$

hope it will help you

Answer 2

( a + b )³ = a³ + b³ + 3ab ( a + b )

Or

( a + b )³ = a³ + b³ + 3a²b + 3ab²

$<h2><u>Other identities are :-</h2></u>$

⇒ ( a - b)³ = a³ - b³ - 3a²b + 3ab²

⇒ ( a + b ) ( a - b ) = a² - b²

⇒ ( a + b )² = a² + b² + 2ab

⇒ ( a - b )² = a² + b² - 2ab

⇒ a³ + b³ = ( a + b ) ( a² + b² - ab )

⇒ a³ - b³ = ( a - b ) ( a² + b² + ab )

⇒ a³ + b³ + c³ - 3abc = ( a + b + c ) ( a² + b² + c² - ab - bc - ca )