х1=1-√13/2
х2=1+√13/2
у=3(х²-х-3)/3х²-3х+1
0=3(х²-х-3)/3х²-3х+1
0=3(x²-x-3)/3x²-3x+1, хЄR
3(x²-x-3)/3x²-3x+1=0
3(x²-x-3)=0
x²-x-3=0
x=-(-1)±√(-1)²-4×1×(-3)/2×3
x=1±√(-1)²-4×(-3)/2
x=1±√1-4×(-3)/2
x=1±√1+12/2
x=1±√13/2
x=1+√13/2;x=1-√13/2
x1=1-√13/2; x2=1+√13
