I thought i could start with the easy part the denominator but then i don't know what to do with the Z's and end up as shown in picture, aaa my head hurts lol.
Homework Statement
Hi, i have been trying to solve this equation for the past 2 hours but am not getting anywhere near the given answer. If anyone can solve this it would be greatly appreciated! Thank you.Homework Equations
The answer is circled in red and was derived from the line above it...