Question: 1 Do not use a calculator in answering this question. It is given that 2-i is a root of the equation 22 + azz-2z +b


1 Do not use a calculator in answering this question. It is given that 2-i is a root of the equation 22 + azz-2z +b =0. (a) Find the values of the real numbers a and b and the remaining roots of the equation. [4] (b) Using these values of a and b, deduce the roots of the equation bz3 - 272 + az + 2= 0. [2]
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