( y-3)(y+3)=y(y-2)y^2+9=y^2-2y
2y=-9
y=-4.5
(y-3)(y+3)=y(y-2)
y^2-9=y^2-2y
Y^2-9-y^2+2y=0
-9+2y=0
2y=9
y=9:2
y=4,5
( y-3)(y+3)=y(y-2)
y^2+9=y^2-2y
2y=-9
y=-4.5
(y-3)(y+3)=y(y-2)
y^2-9=y^2-2y
Y^2-9-y^2+2y=0
-9+2y=0
2y=9
y=9:2
y=4,5