4400 Higher November 2008 Paper 3 Q14
14
(a) Factorise completely \(9ab - 12b^2\) (2)
(b) Simplify \((2ab^2)^3\) (2)
| Scheme | Marks |
|---|---|
| \(3b(3a - 4b)\) | B2 |
| (2) |
Notes
B2: B1 for \(3(3ab - 4b^2)\) or \(b(9a - 12b)\) or for two factors one of which is \(3b\) or \((3a - 4b)\) and the other is linear
| Scheme | Marks |
|---|---|
| \(8a^3b^6\) | B2 |
| (2) | |
| (4 marks) |
Notes
B2: B1 for 8 B1 for \(a^3b^6\)