4400 Higher November 2010 Paper 3 Q13
13
(a) Factorise \(x^2 - 8x + 15\) (2)
(b) Factorise \(x^2 - 49\) (1)
| Scheme | Marks |
|---|---|
| \((x - 5)(x - 3)\) | B2 |
| (2) |
Notes
B2: B1 for one bracket correct or \((x + 5)(x + 3)\)
| Scheme | Marks |
|---|---|
| \((x - 7)(x + 7)\) | B1 |
| (1) | |
| (3 marks) |