<span>(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</span>
6x=-8
x=-8:6
1
X1=-1-
3
1
x2=1-
3
(5y-5x)+(y^2-xy)=5(y-x)+y(y-x)=(y-x)(5+y).
Y=-5x+6
y=6, 6=-5x+6
-5x=0, x=0
y=8
-5x+6=8
-5x=2
x=-2/5
x=-0.4
y=100
-5x+6=100
-5x=96
x=-96/5
x=-19,2
75.
y=0.3x-6
y=-6, -6=0.3x-6
0.3x=0, x=0
y=-3, 0.3x-6=-3
0.3x=3
x=0.1
y=0, 0.3x-6=0
0.3x=6
x=0.05