4MA0 Foundation June 2012 Paper 2 Q19
19 Expand and simplify
(i) \(5(2x + 1) - 3(3x - 1)\)
(ii) \((y + 5)(y - 7)\)
(4)
| Scheme | Marks |
|---|---|
| (i) \(10x + 5 - 9x + 3\) Answer: \(x + 8\) | B2 |
| (ii) \(y^2 + 5y - 7y - 35\) Answer: \(y^2 - 2y - 35\) | B2 |
| (4) | |
| (Total 4 marks) |
Notes
B2: B1 for 3 correct terms with correct signs
or 4 correct terms ignoring signs
B2: B1 for 3 correct terms with correct signs
or 4 correct terms ignoring signs
N.B. \(-2y\) (with no more \(y\) terms) implies \(+5y - 7y\)