Ответ:

x² + 3x - 4)/(x² - 2x - 15) ≥ 0

((x + 4) . (x - 1)) / ((x - 5) . (x + 3)) ≥ 0

x - 5 > 0

x > 5

x - 1 ≤ 0

x ≤ 1

x + 3 > 0

x > -3

-3 < x

x + 4 ≤ 0

x ≤ -4

x ≤ -4 -3 < x ≤ 1 x > 5