Question

2x (4-x)
X (4x-11)- 7x (x-1)=-2x (x+2)+1

Answer 1

$x(4x - 11) - 7x(x - 1) = - 2x(x + 2) + 1 \ 4 {x}^{2} - 11x - 7 {x}^{2} + 7x = - 2 {x}^{2} - 4x + 1 \ - {x}^{2} = 1 \ {x}^{2} = - 1$
ответ: х =  ∅