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Hey thanksss.... What about other questions? can u solve them please?for question 9(ii)
u have the found 2 roots = 1-√2i and 1+√2i
so the 2 factors of the polynomial that has been found are (u-(1-√2i)) and (u-(1+√2i)) if u multiply these factors together u will get a quadratic equation of u^2-2u+3 now u have the polynomial equation as u^4 + u^2 + 2u + 6....u or x it doesnt matter they are all letters after all anyway apply long division or whatever way u have learnt to find the other quadratic equation..then from that other equation u will find the other 2 roots then boom u have 4 roots found