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OpenStudy (anonymous):
Find all z in C which satisfy: z^2 +2z(conjugate)+1=0
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OpenStudy (anonymous):
Note: C= complex (a+bi)
OpenStudy (anonymous):
cheat? http://www.wolframalpha.com/input/?i=%28a%2Bbi%29^2%2B2%28a-bi%29%2B1%3D0
OpenStudy (anonymous):
how did they do it though?
OpenStudy (jamesj):
Write z = a+bi. Put this into your equation and grind through.
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