Question

Решите неравенство 2 x²-7x-9<0

Answer 1

2x² - 7x - 9 < 0;

2x² - 7x - 9 = 0; D = 49 + 72 = 121; √D = 11; x₁ = (7 + 11)/4 = 4,5; x₁ = (7 - 11)/4 = -1.

Ответ: х ∈ (-1; 4,5)