(3x+4)*2-(3x-1)*(3x+1)=65 Решите уравнение СРОЧНО НАДО!!!
9x^2 + 24x + 16 - (9x^2 - 1) - 65 = 0 9x^2 + 24x + 16 - 9x^2 + 1 - 65 = 0 24x + 16 + 1 - 65 = 0 24x + 17 - 65 = 0 24x - 48 = 0 24x = 48 x = 2