Question: Let f(x) = x 3 x 2 + x + 39. (a) Show that 3 is a root of f(x). (1 mark) (b) Find all

Let f(x) = x 3 x 2 + x + 39. (a) Show that 3 is a root of f(x). (1 mark) (b) Find all of the roots of f(x). (2 marks) (c) Let , , and be the roots of f(x), where R. Show that + = 4, = 13

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