Question 618986
The question asks to write the following term into a + ib form, where “i” is a 
complex number {{{ (sqrt( -1  )) }}}:

{{{(1/(x-i y)) }}}
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Multiply NUM and DEN by the conjugate of the DEN, x + iy
{{{1/(x-i y) = (x + iy)/(x^2 - i^2y^2)}}}
= {{{(x + iy)/(x^2 + y^2)}}}
or {{{x/(x^2+y^2) + i*(y/(x^2+y^2))}}}