Higher November 2018 Paper 1 Q8
8.
(a) Factorise \(x^2 + 2x - 15\). [2]
(b) Write down the solutions of the equation \(x^2 + 2x - 15 = 0\). [1]
| Scheme | Marks | Comments |
|---|---|---|
| \((x-3)(x+5)\) | B2 | B1 for \((x \ldots 3)(x \ldots 5)\) |
| Scheme | Marks | Comments |
|---|---|---|
| \(3,\ -5\) | B1 | Correct or correct FT; FT ‘their \((x\pm a)(x\pm b)\)’ from (a) |
| (3) |