Question

a³ - b³ + 3a - 3b......​

Answer 1

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$\displaystyle \: a³ - b³ + 3a - 3b$

$= \displaystyle \: (a - b)( {a}^{2} +ab + {b}^{2} ) + 3(a - b)$

$= \displaystyle \: (a - b)( {a}^{2} +ab + {b}^{2} + 3)$

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