If z1,z2z_1, z_2z1,z2 are roots of z2−2z+3=0z^2 - 2z + 3 = 0z2−2z+3=0, what is ∣z1−z2∣|z_1 - z_2|∣z1−z2∣?
222\sqrt{2}22
2\sqrt{2}2
222
444