1MA0 Higher March 2013 Paper 1 Q20
20
(a)
(i) Factorise \(x^2 - 12x + 27\)
(ii) Solve the equation \(x^2 - 12x + 27 = 0\) (3)
(b) Factorise \(y^2 - 100\) (1)
| Answer | Mark | Notes |
|---|---|---|
| (i) \((x - 9)(x - 3)\) | 3 | M1 for \((x \pm 9)(x \pm 3)\) A1 for \((x - 9)(x - 3)\) |
| (ii) \(x = 9\), \(x = 3\) | B1 cao |
| Answer | Mark | Notes |
|---|---|---|
| \((y + 10)(y - 10)\) | 1 | B1 for \((y + 10)(y - 10)\) |