Question

(z^3-4z)/2-z=0 решите

Answer 1

(z^3-4z)/2-z=0
(z(z^2-4z))/(2-z)=0
(-z(2-z)(2+z))/(2-z)=0
-z(2+z)=0
z=0           2+z=0
                 z=-2