4400 Higher November 2004 Paper 3 Q16
16
(a) Factorise the expression \(2x^2 + 5x - 3\) (2)
(b) Simplify fully \(\dfrac{x^2 - 9}{x^2 - 9x + 18}\) (3)
| Scheme | Marks |
|---|---|
| \((2x - 1)(x + 3)\) | B2 |
| (2) |
Notes
B2: (Signs interchanged, B1)
| Scheme | Marks |
|---|---|
| \(\dfrac{(x + 3)(x - 3)}{(x - 6)(x - 3)}\) | M1 M1 |
| \(\dfrac{x + 3}{x - 6}\) | A1 |
| (3) | |
| (5 marks) |
Notes
M1: (Num.)
M1: (Denom.)