x^2-4x=x-4
x^2-5x+4=0
x1=1
x2=4
х²-4x=x-4
x²-5x+4=0
x²-x-4x+4=0
x(x-1)-4(x-1)=0
(x-4)(x-1)=0
x=4 ∨ x=1
x^2-4x=x-4
x^2-5x+4=0
x1=1
x2=4
х²-4x=x-4
x²-5x+4=0
x²-x-4x+4=0
x(x-1)-4(x-1)=0
(x-4)(x-1)=0
x=4 ∨ x=1