Решите уравнения 12x^2 -(4x-3)(3x+1)= -2

Question

Решите уравнения 12x^2 -(4x-3)(3x+1)= -2

Answer 1

12x^2 - (12x^2 + 4x - 9x - 3) = - 2
12x^2 - (12x^2 - 5x - 3) = - 2
12x^2 - 12x^2 + 5x + 3 + 2 = 0 
5x + 5 = 0 
5x = - 5 
x =  - 1