Question

I am a little bit confused as to how should I approach this type of question, it will be solved using de moivre's theorem but I am confused in the initial steps.
​

Answer 1

I am a little bit confused as to how should I approach this type of question, it will be solved using de moivre's theorem but I am confused in the initial steps.

Use long division method to check whethes (3272 ) factor of (3,97 5x3 - x2 + 3x to), 3a