18x^2 - (9x + 2)(2x - 1) = 1
18x^2 - (18x^2 - 9x + 4x - 2) = 118x^2 - 18x^2 + 9x - 4x + 2 = 19x - 4x + 2 = 15x + 2 = 15x = -1x = -1/5
Ответ: x = -1/5.
18x^2 - (9x + 2)(2x - 1) = 1
18x^2 - (18x^2 - 9x + 4x - 2) = 1
18x^2 - 18x^2 + 9x - 4x + 2 = 1
9x - 4x + 2 = 1
5x + 2 = 1
5x = -1
x = -1/5
Ответ: x = -1/5.