If z1z_1z1 and z2z_2z2 are roots of z2−2z+3=0z^2 - 2z + 3 = 0z2−2z+3=0, what is ∣z1−z2∣|z_1 - z_2|∣z1−z2∣?
2
\sqrt{8}
\sqrt{2}
2i