4MA0 Foundation June 2015 Paper 1R Q13
13
(a) Simplify
(i) \(t^3 + t^3 + t^3 + t^3\)
(ii) \(10x - 4y - 2x - y\)
(iii) \(e \times e \times 7\)
(4)(b) Factorise \(g^2 + 4g\) (2)
| Scheme | Marks |
|---|---|
| (i) Answer: \(4t^3\) | B1 |
| (ii) Answer: \(8x - 5y\) | B2 |
| (iii) Answer: \(7e^2\) | B1 |
| (4) |
Notes
B2: B1 for \(8x\) or \(-5y\)
B1: accept \(e^27\) (no × signs)
| Scheme | Marks |
|---|---|
| \(g(g + 4)\) | B2 |
| (2) | |
| Total 6 marks |
Notes
B2: Award B2 also for \((g \pm 0)(g + 4)\) oe
B1 for factors which, when expanded and simplified, give two terms, one of which is correct except B0 for \((g + 2)(g - 2)\)