| Exam Board | AQA |
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| Module | C1 (Core Mathematics 1) |
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| Year | 2008 |
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| Session | January |
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| Topic | Quadratic Functions |
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5
- Factorise \(9 - 8 x - x ^ { 2 }\).
- Show that \(25 - ( x + 4 ) ^ { 2 }\) can be written as \(9 - 8 x - x ^ { 2 }\).
- A curve has equation \(y = 9 - 8 x - x ^ { 2 }\).
- Write down the equation of its line of symmetry.
- Find the coordinates of its vertex.
- Sketch the curve, indicating the values of the intercepts on the \(x\)-axis and the \(y\)-axis.