Z=(x²+x+5)/x
z+3/z+4=0
z²+4z+3=0,z≠0
По теореме Виета z1+z2=-4 U z1*z2=3
z1=-3
(x²+x-5)/x=-3
x²+x-5+3x=0,x≠0
x²+4x-5=0
x1+x2=-4 U x1*x2=-5
x1=-5 U x2=1
(x²+x-5)/x=-1
x²+x-5+x=0,x≠0
x²+2x-5=0
D=4+20=24
x1=(-2-2√6)/2=-1-√6
x2=-1+√6
Ответ x={-1-√6;-1+√6;-5;1}