Question

Resolva : (a-b) . ( a+b). ( 3a-b)

Answer 1

Olá meu anjo.

(a-b).(a+b).(3a-b)
(a²+ab-ab-b²).(3a-b)
(a²-b²).(3a-b)
3a³-a²b-3ab²+b³

Espero ter te ajudado ^^

Answer 2

(a - b)(a + b)(3a - b)

(a² - b²)(3a - b) = 3a³ - a²b - 3ab² + b³