y-3y²+3-9y=1+2y²
5y²+8y-2=0
5(y²+8/5y-2/5)=0
y²+8/5y-2/5=0(y+4/5)²-26/25=0
y+4/5=±√26／5
y=(√26-4)5,(﹣√26﹣4)/5