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What is the following derivative:

[tex]\frac{\partial}{\partial x}|b-ax|^2[/tex]?

Now I know that [tex]|b-ax|^2=(b-ax)(b^*-a^*x^*)[/tex], so how to do the differentiation with respect to [tex]x^*[/tex]?

Thanks in advance

PS.: All variables and constants are complex.

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# Derivative of Complex Variables

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