Question

efetue os cubos dos binomios: (x-5)^3 e (3-y)^3

Answer 1

(x - 5)³ = (x - 5)²(x - 5)

(x - 5)³ = (x² - 10x + 25)(x - 5)
(x - 5)³ = x³ - 5x² - 10x² + 50x + 25x - 125
(x - 5)³ = x³ - 15x² + 75x - 125


(3 - y)³ = (3 - y)²(3 - y)

(3 - y)³ = (y² - 6y + 9)(3 - y)
(3 - y)³ = - y³ + 6y² - 9y + 27