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6-x2+x-5-1/3=0
-x2+x/3=0
-x2+x=0
delta=1
odp
x1=1 i x2=0
3x2-15x=-10x-2x2
5x2-5x=0
x(5x-5)=0
0, 5x-5=0
5x=5 / /5
x=1
odp. x1=0 , x2=1