বীজগণিতের ঘন সূত্র ও অনুসিদ্ধান্ত :

• (a + b)³= a³ + 3a²b + 3ab² + b³

• (a + b) ³= a³ + b³ + 3ab (a + b)

• (a – b) ³= a³ – 3a²b + 3ab² – b3

• (a – b) ³= a³ – b³ – 3ab (a – b)

• a³ + b³ = (a + b) (a² – ab + b²)

• a³ + b³ = (a + b) ³– 3ab (a + b)

• a³ – b³ = (a – b) (a² + ab + b²)

• a³ – b³ = (a – b) ³+ 3ab (a – b)

 • (a + b + c) ³= a³ + b³ + c³ + 3 (a + b) (b + c) (c + a)

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

 • a³ + b³ + c³ – 3abc =  (a + b + c) { (a – b)² + (b – c) ²+ (c – a) ²}