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Question

Find complex number z satisfying the equation |z−4| = |z−12| .

A
2+3i
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B
4
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C
8
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D
None of these
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Solution

The correct option is C 8
Given equation is |z4| = |z12|

Let z=x+iy, then

(x4)2+y2=(x12)2+y2

x28x+16=x224x+144

16x=128

Hence x=8.

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