4400 Higher June 2005 Paper 4 Q4
4
(a) Simplify
(i) \(p \times p \times p \times p\)
(ii) \(2a + 3b - 5a + b - 7\)
(iii) \(\dfrac{q^3 \times q^5}{q^2}\) (4)
(b) Multiply out \(x(2x + 3)\) (2)
(c) Multiply out and simplify \((y - 1)(y + 2)\) (2)
| Scheme | Marks |
|---|---|
| (i) \(p^4\) | B1 |
| (ii) \(-3a + 4b - 7\) | B2 |
| (iii) \(q^6\) | B1 |
| (4) |
Notes
B2: B1: 2 terms. subs include working: −B1
| Scheme | Marks |
|---|---|
| \(2x^2 + 3x\) | B2 |
| (2) |
Notes
B2: B1 each term. subs include working: −B1
| Scheme | Marks |
|---|---|
| \(y^2 + 2y - y - 2\) | M1 |
| \(y^2 + y - 2\) | A1 |
| (2) | |
| (8 marks) |
Notes
M1: 3 terms correct or 4 terms correct ignoring sign
A1: Incorrect subsequent work: −A1