Question

Дам 77 балов; представте в виде многочленов 1) (3m-2n^2)^3
2) (3x-8y)^2
3) (3a^2 + 2c)^2

Answer 1

(3m - 2n²)³ = (3m)³ - 3 * (3m)² * 2n² + 3 * 3m * ( 2n²)² - (2n²)³ =
= 27m³ - 54m²n² + 12mn⁴ - 8n⁶

(3x - 8y)² = (3x)² - 2 * 3x * 8y + (8y)² = 9x² - 48xy + 64y²

(3a² + 2c)² = (3a²)² + 2 * 3a² * 2c + (2c)² = 9a⁴ + 12a²c + 4c²