(a – b)² = a² – 2ab + b²...........
(a – b)(a + b) = a² – b²...............
(a + b)² = a² + 2ab + b²............(a – b)³ = a³ – 3a²b + 3ab² – b³ ..............
a3 – b3 = (a – b)(a2 + ab + b2)............
a3 + b3 = (a + b)(a2 – ab + b2)............succese :d