5. Упростите выражение: 1) (3x – 5y - 8υ) - (2x + 7y – 3υ) + (5υ – 11x + y); 2) (2a³+3a²-a + 1) - (4a⁴ + 6a3 – 2a² + 2a) – (2a 5 + 3a⁴- a³+ a²).

1) (3x – 5y - 8υ) - (2x + 7y – 3υ) + (5υ – 11x + y) = 3x - 5y - 8υ - 2x - 7y + 3υ + 5υ - 11x + y = (3x - 2x - 11x) + (-5y - 7y + y) + (-8υ + 3υ + 5υ) = -10x - 11y + 0 = -10x - 11y

2) (2a³+3a²-a + 1) - (4a⁴ + 6a³ – 2a² + 2a) – (2a 5 + 3a⁴- a³+ a²) = 2a³+3a²-a + 1 - 4a⁴ - 6a³ + 2a² - 2a - 2a⁵ - 3a⁴ + a³ - a² = -2a⁵ + (-4a⁴ - 3a⁴) + (2a³ - 6a³ + a³) + (3a² + 2a² - a²) + (-a - 2a) + 1 = -2a⁵ - 7a⁴ - 3a³ + 4a² - 3a + 1

Ответ: 1) -10x - 11y; 2) -2a⁵ - 7a⁴ - 3a³ + 4a² - 3a + 1