Ответ Автор - Narvazik 4x - 1 - 2x - 1 - 4x^2 + 12x + 9 = 3814 x - 4x^2 = 38 - 9 +214 x - 4x^2= 31x ( 14 - 4x )= 31x = 31 или 14 - 4х = 31 - 4х = 17 x= - 3.5