6/x-6/(x+1)=0.2
(6/x-6/(x+1))*x=0.2*x
6/(x+1)=0.2x
6/(x+1)*(x+1)=0.2x*(x+1)
6=0.2x²+0.2x
-0.2x²-0.2x+6=0
D=-0.2²-4*(-0.2)*6=4.84
x1=(√4.84-(-0.2))/(2*(-0.2))=-6
x2=(-√4.84-(-0.2))/(2*(-0.2))=5км/ час
6/x-6/(x+1)=0.2
(6/x-6/(x+1))*x=0.2*x
6/(x+1)=0.2x
6/(x+1)*(x+1)=0.2x*(x+1)
6=0.2x²+0.2x
-0.2x²-0.2x+6=0
D=-0.2²-4*(-0.2)*6=4.84
x1=(√4.84-(-0.2))/(2*(-0.2))=-6
x2=(-√4.84-(-0.2))/(2*(-0.2))=5км/ час