Foundation November 2021 Paper 2 Q27
27 Solve \(x^2 - 7x - 18 = 0\) (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| \({-2}\), 9 | M1 | for \((x \pm 2)(x \pm 9)\) or for \((x + a)(x + b)\) where either \(ab = -18\) or \(a + b = -7\) or one correct answer |
| M1 | for \((x + 2)(x - 9)\) | |
| A1 | cao |
Additional guidance
Sight of one correct answer as the final answer can gain one mark with or without working