what is the formula of ( a- b) per whole cube
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Its a3-3a2b+3ab2-b3
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vikassingh7:
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( a - b )³ = ( a - b ) ( a - b ) ( a - b )
( a - b )³ = ( a² + b² - 2 ab ) ( a - b )
( a - b )³ = a³ - a²b + ab² - b³ - 2 a²b + 2 ab²
( a - b )³ = a³ - b³ - 3 a²b + 3 ab²
( a - b )³ = a³ - b³ - 3 ab ( a - b ).
So, ( a - b )³ = a³ - b³ - 3 ab ( a - b ) or a³ - b³ + 3 ab² - 3 ab².
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( a - b )³ = ( a - b ) ( a - b ) ( a - b )
( a - b )³ = ( a² + b² - 2 ab ) ( a - b )
( a - b )³ = a³ - a²b + ab² - b³ - 2 a²b + 2 ab²
( a - b )³ = a³ - b³ - 3 a²b + 3 ab²
( a - b )³ = a³ - b³ - 3 ab ( a - b ).
So, ( a - b )³ = a³ - b³ - 3 ab ( a - b ) or a³ - b³ + 3 ab² - 3 ab².
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