(x-3)²-2x²+18=0
x²-6x+9-2x²+18=0
-x²-6x+27=0
x²+6x-27=0
D=36+108=144,√D=√144=12
x1=(-6+12)/2=6/2=3, x1=3
x2=(-6-12)/2=-18/2=-9, x2=-9
1) (y(3-y)+y^2)/(3-y)=
=(3y-y^2+y^2)/(3-y)=
=3y/(3-y)
2) ((y-3)/(y+3))*(3y/(3-y))=
=-3y/(y+3)
A=1 b=3 c=2
D=9-8=1
x1=-3+1/2=-1
x2=-3-1/2=-1
Ответ: -2 и -1
log(35)175*245=log(35)42875=log(35)35^3=3log(35)35=3*1=3
А) у^2 / (у-3)
б) (х-5)^2 / (5х*(х-5)) = (х-5)/(5х)