rumanezzo

Объяснение:

g(2x + 3) = (2x + 3)² - 6(2x + 3) = 4x² + 12x + 9 - 12x - 18 = 4x² - 9

4x² - 9 ≤ 16

4x² - 25 ≤ 0

(2x - 5)(2x + 5) ≤ 0

-2.5 ≤ x ≤ 2.5

x∈[-2.5; 2.5]