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Question

Find the square root of complex number z=3+4i

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Solution

Given, z=3+4i

(x+iy)2=3+4i

x2y2+i(2xy)=3+4i

x2y2=3 and 2xy=4

x2y2=3 and xy=2

x=2 and y=1

3+4i=2+i

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