then id get to y^2= 3 rt(7) and would i take the negative root and just make into a complex number so 3rt(7) i
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Geometrically it is seen that is a circle of radius with centre at the origin. Re(z) = 0 is the imaginary axis. Clearly then the points of intersection are and .
By the way, .
Again, you've misunderstood how to get the magnitude of a complex number.