Complex Numbers

Homework Statement

Hey guys.
I have this equation in red (in the pic) which I need to solve

http://img241.imageshack.us/img241/9323/scan0004n.jpg [Broken]

As you can see I came up with with 2*t0.
When I solve it in Matematica I come up with t2=t0 without the 2.
Also, their answer in the book is also only t0.

Thanks.

The Attempt at a Solution

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