Monday, 6 June 2016

Find the complex square root of 7+6sqrt2i


Find the complex square root of
7+62i
giving your answer in the form x+iy where x and y are real.





The answer I have gotten is 23+842i
by squaring 7+62i,
but the “correct” answer is ±(3+i2).



Can you explain how I got this wrong?

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