АК
Анастасия Клопотовская
Вот 9 + 16x^2 - 24x - 1/3(3x-2)(3x+2) = 13x^2 - 2/3
9 + 16x^2 - 24x - 1/3(9x^2 - 4 ) = 13x^2 - 2/3
(39x^2 - 72x + 31 )/3 = 13x^2 - 2/3
13x^2 - 24x + 31/3 = 13x^2 - 2/3
- 24x = - 11
x = 11/24