Решите уравнение 14x^2-(2x-3)(7x+4)=14

Question

Решите уравнение 14x^2-(2x-3)(7x+4)=14

Answer 1

14x^2 - (2x-3)(7x+4) = 14
14x^2 - (14x^2 + 8x - 21x - 12) = 14
14x^2 - 14x^2 + 13x + 12 - 14 = 0
13x - 2 =0
13x = 2
x = 2/13