a) -(x + 2)(3x² – x + 1) = -(3x³ - x² + x + 6x² - 2x + 2) = -(3x³ + 5x² - x + 2) = -3x³ - 5x² + x - 2
б) -(6a² – a + 2)(a – 2) = -(6a³ - 12a² - a² + 2a + 2a - 4) = -(6a³ - 13a² + 4a - 4) = -6a³ + 13a² - 4a + 4
в) 2а(а – 2)(a² – 3a + 1) = 2a(a³ - 3a² + a - 2a² + 6a - 2) = 2a(a³ - 5a² + 7a - 2) = 2a⁴ - 10a³ + 14a² - 4a
г) -b(b + 4)(b² – 4b + 16) = -b(b³ - 4b² + 16b + 4b² - 16b + 64) = -b(b³ + 64) = -b⁴ - 64b
Ответ: -3x³ - 5x² + x - 2; -6a³ + 13a² - 4a + 4; 2a⁴ - 10a³ + 14a² - 4a; -b⁴ - 64b