| Exam Board | AQA |
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| Module | Further Paper 1 (Further Paper 1) |
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| Year | 2020 |
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| Session | June |
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| Topic | Roots of polynomials |
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8 The three roots of the equation
$$4 x ^ { 3 } - 12 x ^ { 2 } - 13 x + k = 0$$
where \(k\) is a constant, form an arithmetic sequence.
Find the roots of the equation.