6y²+2y-9y-3+2(y²-25)=4(1-2y)+6y
6y²+2y-9y-3+2y²-50=4-8y+6y
8y²-7y-53=4-2y
8y²-7y-53-4+2y=0
8y²-5y-57=0
8y²+19y-24y-57=0
(8y+19)(y-3)=0
9y+19=0 или y-3=0
y=
y=3
6y²+2y-9y-3+2(y²-25)=4(1-2y)+6y
6y²+2y-9y-3+2y²-50=4-8y+6y
8y²-7y-53=4-2y
8y²-7y-53-4+2y=0
8y²-5y-57=0
8y²+19y-24y-57=0
(8y+19)(y-3)=0
9y+19=0 или y-3=0
y=
y=3