| Exam Board | OCR |
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| Module | C1 (Core Mathematics 1) |
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| Year | 2009 |
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| Session | January |
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| Topic | Quadratic Functions |
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6
- Express \(5 x ^ { 2 } + 20 x - 8\) in the form \(p ( x + q ) ^ { 2 } + r\).
- State the equation of the line of symmetry of the curve \(y = 5 x ^ { 2 } + 20 x - 8\).
- Calculate the discriminant of \(5 x ^ { 2 } + 20 x - 8\).
- State the number of real roots of the equation \(5 x ^ { 2 } + 20 x - 8 = 0\).