Higher November 2021 Paper 5 Q17
17 Simplify fully.
\[\frac{2x^2 - 50}{x^2 + 7x + 10}\][5]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\dfrac{2(x - 5)}{x + 2}\) or \(\dfrac{2x - 10}{x + 2}\) final answer | 5 | M2 for \(2(x - 5)(x + 5)\) or \((2x - 10)(x + 5)\) or M1 for \(2(x^2 - 25)\) M2 for \((x + 2)(x + 5)\) or M1 for \(x(x + 2) + 5(x + 2)\) or \(x(x + 5) + 2(x + 5)\) or for \((x + a)(x + b)\) where \(a + b = 7\) or \(ab = 10\) | For method marks condone omission of final bracket |