Higher June 2025 Paper 5 Q20
20 Simplify.
\(\dfrac{x^2 - 36}{x^2 - x - 42}\) [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\frac{x - 6}{x - 7}\) final answer | 4 | B1 for \((x - 6)(x + 6)\) isw AND B2 for \((x + 6)(x - 7)\) isw or M1 for \(x(x + 6) - 7(x + 6)\) seen or \(x(x - 7) + 6(x - 7)\) seen or for \((x + a)(x + b)\) where \(a + b = -1\) or \(ab = -42\) isw | If answer \(x\) – 6/\(x\) – 7 check working and if seen written correctly allow 4 marks |