Question

(a+b) (a²-ab²)=a³+b³​

Answer 1

Explicación paso a paso:

a³ + b³ = (a + b) (a² - ab + b²)

sabes que

(a + b) ³ = a³ + 3ab (a + b) + b³

luego a³ + b³ = (a + b) ³ - 3ab ( a + b)

= (a + b) [(a + b) ² - 3ab]

= (a + b) (a² + 2ab + b² - 3ab)

= (a + b) (a² - ab + b²)