Foundation November 2017 Paper 2 Q18
18
(a) Factorise.\[x^2 - 43^2\]
[1]
(b) Calculate.\[57^2 - 43^2\]
[2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \((x - 43)(x + 43)\) final answer | 1 | Condone omission of final bracket | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 1400 | 2 | M1 for (57 + 43) (57 – 43) FT their quadratic factors in (a) or better or B1 for 3249 or 1849 seen | M1 for FT factors \((x + 43)(x + 43)\) or \((x - 43)(x - 43)\) only |