4x(16-8x+x^2)=7(4-x) помогите с уравнением
4x (4 - x)^2 - 7(4 - x) = 0 (4 - x)(4x (4 - x) - 7) = 0 1) 4 - x = 0 - x = - 4 x = 4 2) 16x - 4x^2 - 7 = 0 4x^2 - 16x + 7 = 0 D = 144 = 12^2 x2 = ( 16 + 12)/8 = 3,5 x3 = ( 16 - 12)/8 = 0,5 Ответ 0.5; 3.5; 4