Question

calcule a diferenca entre a cubo de (4a-b) e o cubo de (4a+b)

Answer 1

(4a-b)³ = 64a³-3.16a².b+3.4a.b²-b³ = 64a³ - 48a²b + 12ab² - b³

(4a+b)³ = 64a³ + 48a²b + 12ab² + b³

(4a-b)³ - (4a+b)³ = -96a²b - 2b³