Respuestas

  • Usuario de Brainly
2013-08-10T19:44:07+02:00
Aplicas esta fórmula
(a - b)² = a² - 2ab + b²

(2x/3 - 4y)² = (2x/3)² - 2(2x/3)(4y) + (4y)²
(2x/3 - 4y)² = 4x/9  - 16xy/3 + 16y²

(a -b)³ = a³ - 3a²b + 3ab² - b³

(3a - 2b)³ = (3a)³ - 3(3a)²(2b) + 3(3a)(2b)² - (2b)³
(3a - 2b)³ = 27a³ - 54a²b + 36ab² - 8b³

espero que te sirva, salu2!!!!!