4400 Higher June 2007 Paper 3 Q6
6
(a) Expand and simplify \(3(4x - 5) - 4(2x + 1)\) (2)
(b) Expand and simplify \((y + 8)(y + 3)\) (2)
(c) Expand \(p(5p^2 + 4)\) (2)
| Scheme | Marks |
|---|---|
| \(12x - 15 - 8x - 4\) | M1 |
| \(4x - 19\) | A1 |
| (2) |
Notes
M1: for at least 3 terms correct inc signs
A1: cao
| Scheme | Marks |
|---|---|
| \(y^2 + 3y + 8y + 24\) | M1 |
| \(y^2 + 11y + 24\) | A1 |
| (2) |
Notes
M1: for 3 terms correct or \(y^2 + 11y\) seen
| Scheme | Marks |
|---|---|
| \(5p^3 + 4p\) | B2 |
| (2) | |
| (6 marks) |
Notes
B2: cao B1 for either \(5p^3\) or for \(+4p\)