tracks/kotlin/exercises/complex-numbers/README.md in trackler-2.2.1.13 vs tracks/kotlin/exercises/complex-numbers/README.md in trackler-2.2.1.14

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 A complex number is a number in the form `a + b * i` where `a` and `b` are real and `i` satisfies `i^2 = -1`.
 
 Assume the programming language you are using does not have an implementation of complex numbers.
 
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 ## Source
 
 Wikipedia [https://en.wikipedia.org/wiki/Complex_number](https://en.wikipedia.org/wiki/Complex_number)