1MA0 Higher November 2013 Paper 1 Q4
4
(a) Simplify \(4y + 2x - 3 + 3x + 8\) (2)
(b) Factorise fully \(9x^2 - 6xy\) (2)
(c) Expand \(4(x + 2)\) (1)
(d) Expand and simplify \((x - 5)(x + 3)\) (2)
| Answer | Mark | Notes |
|---|---|---|
| \(4y + 5x + 5\) | 2 | M1 \(5x\) or 5 seen A1 cao |
| Answer | Mark | Notes |
|---|---|---|
| \(3x(3x - 2y)\) | 2 | B2 for \(3x(3x - 2y)\) (B1 for \(x(9x - 6y)\) or \(3(3x^2 - 2xy)\) or \(3x(ax - by)\) where \(a\) and \(b\) are integers not equal to zero) |
| Answer | Mark | Notes |
|---|---|---|
| \(4x + 8\) | 1 | B1 cao |
| Answer | Mark | Notes |
|---|---|---|
| \(x^2 - 2x - 15\) | 2 | M1 for 4 terms correct with or without signs or 3 out of no more than 4 terms correct with correct signs A1 cao |