(3x - 1)(12x + 1) - 10 = (6x + 2)²,
36х² + 3х - 12х - 1 - 10 = 36х² + 24х + 4,
36х² - 9х - 11 = 36х² + 24х + 4,
36х² - 9х - 11 - 36х² - 24х - 4 = 0,
-33х - 15 = 0,
-33х = 15,
-11х = 5,
х = -5/11.
(3x - 1)(12x + 1) - 10 = (6x + 2)²,
36х² + 3х - 12х - 1 - 10 = 36х² + 24х + 4,
36х² - 9х - 11 = 36х² + 24х + 4,
36х² - 9х - 11 - 36х² - 24х - 4 = 0,
-33х - 15 = 0,
-33х = 15,
-11х = 5,
х = -5/11.