(a) Find the (complex) roots of the quadratic equation (x^{2}-5 x+7-i=0). (b) Find the roots of the...
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(a) Find the (complex) roots of the quadratic equation \(x^{2}-5 x+7-i=0\).
(b) Find the roots of the quartic equation \(x^{4}+x^{2}+1=0\).
(c) Find the roots of the equation \(2 x^{4}-4 x^{3}+3 x^{2}+2 x-2=0\), given that one of them is \(1+i\).
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