x^2-5x+4=0
x^2-x-4x+4=0
x(x-1)-4(x-1)=0
(x-1)(x-4)=0
x-1=0 => x=1.
x-4=0 => x=4.
|1-4|=|-3|=3
ответ: 3.
x^2-5x+4=0
x^2-x-4x+4=0
x(x-1)-4(x-1)=0
(x-1)(x-4)=0
x-1=0 => x=1.
x-4=0 => x=4.
|1-4|=|-3|=3
ответ: 3.