4MA0 Foundation June 2013 Paper 1R Q13
13
(a) Simplify
(i) \(a \times 5 \times b \times c\)
(ii) \(q^5 + q^5 + q^5\)
(iii) \(7m + 6n - 2m - 9n\)
(4)(b) Factorise \(t^2 - 10t\) (2)
| Scheme | Marks |
|---|---|
| (i) \(5abc\) | B1 |
| (ii) \(3q^5\) | B1 |
| (iii) \(5m - 3n\) | B2 |
| (4) |
Notes
B1: letters and numbers in any order but no × signs
B2: B1 for \(5m\) or \(-3n\)
| Scheme | Marks |
|---|---|
| \(t(t - 10)\) | B2 |
| (2) |
Notes
B2: Also accept \((t \pm 0)(t - 10)\) for B2
B1 for factors which, when expanded and simplified, give only two terms, one of which is correct.
SC B1 for \(t(t - 10t)\)