# Complex numbers

1. Dec 7, 2004

### daster

Could someone please show me how:

$$z_1\bar{z_2} + \bar{z_1}z_2 = 2\:Re(z_1\bar{z_2})$$

where $\bar{z}$ is the conjugate of $z$.

2. Dec 7, 2004

### daster

Nevermind. I got it.