Factors

  • ( a+b )2 = a2 + b2 + 2ab
  • ( a-b )2 = a2 + b2 – 2ab
  • ( a2 – b2) = ( a+b ) ( a-b )
  • ( a2 + b2 ) = ( a+b )2– 2ab
  • ( a+b )3 = a3 + b3 + 3ab( a+b )
  • ( a-b )3 = a3 – b3 – 3ab( a-b )
  • ( a+b+c)2 = a2 + b2 + c2 +2(ab + bc + ac )
  • a3 + b3 + c3 – 3 abc = ( a+b+c ) ( a2 + b2 + c2 – ab – bc – ac )
  • ( a+b )4 = a4 + b4 + 2ab ( 2a2 + 3ab + 2b2)
  • ( a-b )4 = a4 + b4 – 2ab ( 2a2 + 3ab – 2b2 )