Higher June 2024 Paper 2 Q11
11
(i) Factorise \(\quad x^2 + 9x - 22\) (2)
(ii) Hence, solve \(\quad x^2 + 9x - 22 = 0\) (1)
| Scheme | Marks |
|---|---|
| \((x \pm 2)(x \pm 11)\) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: \((x - 2)(x + 11)\) | A1 |
| (2) |
Notes
M1: Or \((x + a)(x + b)\) where \(ab = -22\) or \(a + b = 9\)
| Scheme | Marks |
|---|---|
| 2, −11 | B1ft |
| (1) | |
| (3 marks) |
Notes
B1ft: Must ft from their factors in (i)