4400 Higher June 2009 Paper 4 Q16
16
(a) Factorise \(2x^2 - x - 3\) (2)
(b) Hence write down the solutions of \(2x^2 - x - 3 = 0\) (1)
| Scheme | Marks |
|---|---|
| \((2x - 3)(x + 1)\) | B2 |
| (2) |
Notes
B2: B1 for one correct factor or \((2x + 3)(x - 1)\) (integers only)
| Scheme | Marks |
|---|---|
| “1.5” and “−1” | B1 |
| (1) | |
| (3 marks) |
Notes
B1: both reqd ft (a) if 2 linear factors