4MA0 Foundation January 2015 Paper 1 Q20
20
(a) Expand and simplify \(3(2c - 5) - 2(c - 4)\) (2)
(b) Simplify \((4e^3)^2\) (2)
(c) Expand and simplify \((a + 5)(a - 1)\) (2)
| Scheme | Marks |
|---|---|
| \(6c - 15 - 2c + 8\) | M1 |
| \(4c - 7\) | A1 |
| (2) |
Notes
M1: Any three terms correct
| Scheme | Marks |
|---|---|
| \(16e^6\) | B2 |
| (2) |
Notes
B2: B1 for 16 or \(e^6\) as part of a product or B1 for \(4^2 \times e^{2 \times 3}\)
| Scheme | Marks |
|---|---|
| \(a^2 + 5a - a - 5\) | M1 |
| \(a^2 + 4a - 5\) | A1 |
| (2) | |
| (6 marks) |
Notes
M1: any three terms correct or \(a^2 + 4a + \ldots\) or \(\ldots + 4a - 5\)