A hint to get started
Real coefficients and a known complex root
Consider the equation .
(i) If and are real numbers, what are the possibilities for real and complex roots for this equation?
It is given that is a root of the equation , where and are real numbers.
(ii) Find the values of and .
[2013/NJC/I/11(a)(modified)]
CJC · Discussion · Question 5
Use the real-coefficient condition before invoking conjugate pairs.