Higher June 2018 Paper 2 Q2
2.
(a) Factorise \(a^2 + 5a - 14\). [2]
(b) Factorise \(b^2 - 25\). [1]
(c) Solve \(\dfrac{d}{5} + 2 = 12\). [2]
| Scheme | Marks | Comments |
|---|---|---|
| \((a-2)(a+7)\) | B2 | B1 for \((a \ldots 2)(a \ldots 7)\) |
| Scheme | Marks | Comments |
|---|---|---|
| \((b+5)(b-5)\) | B1 | CAO |
| Scheme | Marks | Comments |
|---|---|---|
| \(d/5 = 12 - 2\) or \(d/5 = 10\) or \(d + 2\times5 = 12\times5\) or \(d + 10 = 60\) | M1 | |
| \(d = 50\) | A1 | CAO. Accept embedded answers Mark final answer If no marks award SC1 for an answer of \(d = 70\) from \(d/5 = 12 + 2\) |
| (5) |