(9х - 7)² - 10 < (9x + 3)(9x - 5),
81х² - 126х + 49 - 10 < 81x² - 45x + 27 x - 15,
81х² - 126х + 39 < 81x² - 18x - 15,
81x² - 126x - 81x² + 18x < -13 - 39,
-108x < - 54,
x > -54 : (-108),
x > 1/2,
х ∈ (1/2; +∞).
ответ: (1/2; +∞).
(9х - 7)² - 10 < (9x + 3)(9x - 5),
81х² - 126х + 49 - 10 < 81x² - 45x + 27 x - 15,
81х² - 126х + 39 < 81x² - 18x - 15,
81x² - 126x - 81x² + 18x < -13 - 39,
-108x < - 54,
x > -54 : (-108),
x > 1/2,
х ∈ (1/2; +∞).
ответ: (1/2; +∞).