(3х²+2х-5)/(3х²+5х)=
(3х²+5х-3х-5)/(3х²+5х)=
1 - ((3х-5)/(3х²+5х))=
1-((3х+5-10)/(3х²+5х))=
1-((3х+5-10)/(х(3х+5)))=
1-(1/х)+(10/(3х²+5х))
{ху= -12
{(х-2)(у-4)= -8
{у= -8/х
{ху-2у-4х+8= -8
-12+(24/х)-4х+8= -8
-4х²-12х+40=0
-х²-3х+10=0
х1= -(3-√(9+40)):2=2 ⇒у1= -12/2= -6
х2= -(3+√(9+40)):2= -5 ⇒у2= -12/(-5)=0.24
ответ: (2;-6), (-5;0.24)