(3 x- 5y )³ solve...
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3x denoted as a
5y denoted as b
formula :
( a - b )³ = a³ - b³ - 3ab ( a - b )
(3x - 5y)³
3x³ - 5y³ - ( 3 × 3x × 5y ) ( 3x - 5y)
27x³ - 125y³ - 45xy × ( 3x - 5y)
27x³ - 125y³ - 135x²y + 225xy²
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