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  • ( x + a ) ( x + b ) ( x + c ) = x3 + ( a + b + c ) x3 + ( ab + bc + ca ) x + abc 

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

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

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