-2
Объяснение:
(x-3)(x²+3x+9)-x(x-5)(x+5) = x³ + 3x² + 9x - 3x² - 9x - 27 -x * (x² - 25) = x³ - 27 - x³ + 25x = 25x - 27
при x = 1
25x - 27 = 25 * 1 - 27 = 25 - 27 = -2
-2
Объяснение:
(x-3)(x²+3x+9)-x(x-5)(x+5) = x³ + 3x² + 9x - 3x² - 9x - 27 -x * (x² - 25) = x³ - 27 - x³ + 25x = 25x - 27
при x = 1
25x - 27 = 25 * 1 - 27 = 25 - 27 = -2