-2x(х-4)=0
-2x^2+8x=0
x(-2x+8)=0
x=0 -2x=-8
x=4
у(у+3)(у-6)=0
y(y^2-6y+3y-18)=0
y^3-6y^2-3y-18y=0
y(y^2-3y-18)=0
y=0 y^2-3y-18=0
D=9+72=81
y1=(3+9)\2=6 y2=(3-9)\2=-3
z(2-z)(3-2z)=0
z(6-4z-3z+2z^2)=0
6z-7z^2+2z^3=0
z(6-7z+2z^2)=0
z=0 2z^2-7z+6=0
D=49-48=1
z1=(7+1)\4=2 z2=(7-1)\4=3\2
Зх2+15х=0
x(3x+15)=0
x=0 3x=-15
x=-5
9у-у2=0
y(9-y)=0
y=0 y=9
-2х2-4х=0
-2x(x+2)=0
x=0 x=-2
x^3-x^2=0
x^2(x-1)=0
x=0 x=1