Question

efectuati (4x+2) ³= (1-4x) ³= (2t+7x) ³= (2a+7x) ³ va rogggggg ​

Answer 1

Răspuns:

Explicație pas cu pas:

Formule:

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

(4x + 2)³ = (4x)³ + 3·(4x)²·2 + 3·4x·2² + 2³ = 64x³ + 96x² + 48x + 8

(1 - 4x)³ =  1³ - 3·1²·4x + 3·1·(4x)² - (4x)³ = 1 - 12x + 48x² - 64x³

(2t + 7x)³ = (2t)³ + 3·(2t)²·7x + 3·2t·(7x)² + (7x)³ = 8t³ + 84t²x + 249tx² + 343t³

(2a + 7x)³ = (2a)³ + 3·(2a)²·7x + 3·2a·(7x)² + (7x)³ = 8a³ + 84a²x + 249ax² + 343t³

Answer 2

$\it (4x+2)^3=64x^3+96x^2+48x+8\\ \\ (1-4x)^3=1-12x+48x^2-64x^3\\ \\ (2t+7x)^3=8t^3+84t^2x+294tx^2+343x^3\\ \\ \\ (2a+7x)^3=8a^3+84a^2x+294ax^2+343x^3$