Question

Petidaksamaan kuadrat dari 3x^2+9x < x^2-4

Answer 1

Verified answer

3x² + 9x < x² - 4
2x² + 9x + 4 < 0
(x + 4) (2x + 1) < 0
x = -4 x = -½
Hp {-4 < x < -½}