Question

Please give me all identities related to Polynomials class 9

Answer 1

Hey Friend_____


Here is ur answer....


⭐ (a+b)² = a²+ 2ab + b²

⭐ (a–b)² = a²– 2ab + b²

⭐ a² – b² = (a+b) (a–b)

⭐ a² + b² = (a+b)² – 2ab

⭐ (a+b)³ = a³ + 3a²b + 3ab² + b³

⭐ (a–b)³ = a³– 3a²b + 3ab² –b³

⭐ a³+b³ = (a+b)³ –3ab (a+b)

⭐ a³–b³ = (a–b) (a²+ab+b²)

⭐ (a+b+c)² = a² + b² + c² + 2ab+ 2bc + 2ca

⭐ (x+a) (x+b) = x² + (a+b)x + ab

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

⭐ If a+b+c= 0, then

a³+b³+c³= 3abc






Hope it helps u....☺☺☺☺