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