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[" 6.If "a,b" are complex numbers and on...

[" 6.If "a,b" are complex numbers and one of the "],[" roots of the equation "x^(2)+ax+b=0" is "],[" purely real whereas the other is purely "],[" imaginary.and "a^(2)-bar(a)^(2)=kb" ,then "k" is "]

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