Which of the following is equivalent to ∣z1z2∣|z_1 z_2|∣z1z2∣?
Depends on the arguments
∣z1∣+∣z2∣|z_1| + |z_2|∣z1∣+∣z2∣
∣z1∣2∣z2∣2|z_1|^2 |z_2|^2∣z1∣2∣z2∣2
∣z1∣cdot∣z2∣|z_1| \\cdot |z_2|∣z1∣cdot∣z2∣