решите уравнения
(3x+1)^2-(x+0.1)(x-0.1)=8x^2-2.02
(3y-6)(4y-2)-(2y-9)(6y+5)-1=0
(7-3y)^2-(5y+1)(2y-5)+y^2=0

(3x+1)²-(x+0,1)(x-0,1)=8x²-2,029x²+6x+1-(x²-0,01)=8x²-2,029x²+6x+1-x²+0,01=8x²-2,028x²+6x+1,01=8x²-2,028x²+6x-8x²=-2,02-1,016x=-3,03x=(-3,03):6x=-0,505(3y-6)(4y-2)-(2y-9)(6y+5)-1=012y²-6y-24y+12-(12y²+10y-54y-45)-1=012y²-30y+11-(12y²-44y-45)=012y²-30y+11-12y²+44y+45=014y+56=014y=-56y=(-56):14y=-4(7-3y)²-(5y+1)(2y-5)+y²=049-42y+9y²-(10y²-25y+2y-5)+y²=049-42y+10y²-(10y²-23y-5)=049-42y+10y²-10y²+23y+5=0-19y+54=0-19y=-54y=(-54):(-19)y=