Question

Show that (1-i) is the square root of -2i.

Answer 1

You have to show that \[\Large 1-i = \sqrt{-2i}\]

equivalently, you can show that \[\Large (1-i)^2 = -2i\] I squared both sides to get that second equation

Answer 2

Recall (a+b)^2=a^2+2ab+^2
and not a^2+b^2
Just a reminder

Answer 3

@iTiaax any thoughts? or you fainted ?

Answer 4

@jdoe0001 , It's all good! I had no idea how simple this was :O