Foundation June 2019 Paper 1 Q28
28 Multiply out and simplify \(\quad (x + 5)(x - 1)\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(x^2 + 5x - x - 5\) | M1 | three or four terms with three correct \(x^2 + 4x + k\) implies M1 |
| \(x^2 + 4x - 5\) | A1 |
Additional guidance
| Further work, eg \(x^2 + 4x - 5 = 5x - 5\) | M1A0 |
| \(y = x^2 + 4x - 5\) or \(x^2 + 4x - 5 = 0\) | M1A0 |
| \(x^2 + 4x - 4\) | M1A0 |
| \(x^2 + 4x\) | M1A0 |
| Condone \(1x\) for \(x\) eg \(x^2 + 5x - 1x - 5\) | at least M1 |
| Terms may be seen in the grid method or in a list where a plus sign can be implied |