2021 SQA Adv. Higher Maths Paper 2 No.13 Complex roots of an equation

Finding the complex roots of a given equations, given the first root. Deriving a given result from the sum of the roots. Instructional exercise consisting of question 13 from Paper 2 of the 2021 SQA Advanced Higher Mathematics assessment resource. Where appropriate the alternative methods for solving the problem are also given. Set out in stages of 'try then check' the worked solution to each part of the question. Including indications of where each mark is allocated, and the requirements for that mark, according to the marking scheme.