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Determine if a linear expression is a factor of a given cubic expression, and fully factorise the cubic. • Instructional exercise consisting of question 3 from the first paper of the 2015 SQA New Higher Mathematics examination. • 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 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