9x² - 1 = (3x - 2)²9x² - 1 = 9x² - 12x + 40 = -12x + 4 - 10 = -12x + 312x = 3x = 3/12x = 1/4
Ответ: x = 1/4.
9x² - 1 = (3x - 2)²
9x² - 1 = 9x² - 12x + 4
0 = -12x + 4 - 1
0 = -12x + 3
12x = 3
x = 3/12
x = 1/4
Ответ: x = 1/4.