| Exam Board | AQA |
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| Module | C1 (Core Mathematics 1) |
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| Year | 2005 |
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| Session | January |
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| Topic | Quadratic Functions |
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7
- Simplify \(( k + 5 ) ^ { 2 } - 12 k ( k + 2 )\).
- The quadratic equation \(3 ( k + 2 ) x ^ { 2 } + ( k + 5 ) x + k = 0\) has real roots.
- Show that \(( k - 1 ) ( 11 k + 25 ) \leqslant 0\).
- Hence find the possible values of \(k\).