Bad, bad thing to miss classes, specially classes dealing with maths...tsk,tsk,tsk.
Anyway, what you have here requires you first read and understand the basics of complex numbers (conjugate, modulus, operations, etc.), so that you'll "have some idea" what's this about. otherwise it's like asking someone to solve your homework for you and to explain you all this in this forum would be too long.
So study the basics (there are tens of thousands of internet sites with explanations on this: jsut google "complex numbers" and surf the sites) , and then, if you're still stuck somewhere, write back and ask.