Foundation June 2022 Paper 3 Q19
19
(a) Multiply out and simplify. \((x - 4)(x + 5)\) [2]
(b) Factorise. \(x^2 - 25\) [1]
| Answer | Marks | Part marks and guidance | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| \(x^2 + [1]x - 20\) final answer | 2 | M1 for at least three of \(x^2\), [+]\(5x\), \(-4x\), \(-20\) | M1 may be seen in a table e.g.
[1]\(x\) counts as two terms M1 for \(x^2 + [1]x + -20\) Do not accept poor algebra e.g. \(x5\) for \(5x\) or \(x \times x\) for \(x^2\) | |||||||||
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \((x - 5)(x + 5)\) final answer | 1 | Condone missing final bracket | |