Nadite realna rješenja sustava jednadžbi: x+y+z=2x + y + z = 2x+y+z=2 (x+y)(y+z)+(y+z)(z+x)+(z+x)(x+y)=1(x + y)(y + z) + (y + z)(z + x) + (z + x)(x + y) = 1(x+y)(y+z)+(y+z)(z+x)+(z+x)(x+y)=1 x2(y+z)+y2(z+x)+z2(x+y)=−6x^{2}(y + z) + y^{2}(z + x) + z^{2}(x + y) = -6x2(y+z)+y2(z+x)+z2(x+y)=−6