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 October 23rd, 2016, 06:22 AM #1 Member   Joined: Oct 2016 From: Slovenia, Europe Posts: 46 Thanks: 5 I am struggling with a complex equation Hey guys, i have a problem with solving this equation: |z^2-1|=|z|^2 -4 and arg(z+2i)= pi/4 I would be very grateful if anyone helps me
 October 23rd, 2016, 01:17 PM #2 Global Moderator   Joined: May 2007 Posts: 6,254 Thanks: 507 From $\displaystyle arg(z+2i)=\pi /4$, z=(a+2)+ai (a real), with a+2>0. Substitute into the other equation and solve for a. Thanks from topsquark and srecko

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