9у-у*у=0, у(9-у)=0, у1=0, у2=9
х*х*х-х*х=0, х*х(х-1)=0, х*х=0, х1=0, х-1=0, х2=1
4х*4х-25=0, х*х=25/4, х1=5/2=2,5, х2=-2,5
3z*3z-75=0, z*z=75/3, z*z=25, z1=5, z2=-5
4y-у*у*у=0, у(4-у*у)=0, у1=0, 4-у*у=0, у*у=4, у2=2, у3=-2
z-9z*9z*9z=0, z(1-27z*z)=0, z1=0,
1-27z*z=0, z*z=1/27, z2=1/3V3, z3=-1/3V3