Foundation November 2021 Paper 2 Q23
23.
(a) Expand and simplify \((x - 6)(7x + 5)\). [3]
(b) Factorise \(y^2 + 2xy\). [1]
| Scheme | Marks | Comments |
|---|---|---|
| \(7x^2 + 5x - 42x - 30\) | B2 | B1 for any three terms correct; \(nx^2 - 37x + m\) implies two terms correct if not from wrong working |
| \(7x^2 - 37x - 30\) | B1 | Implies previous B2; FT for equivalent level of difficulty, providing 4 terms to consider and like terms to collect |
| Scheme | Marks | Comments |
|---|---|---|
| \(y(y + 2x)\) | B1 | |
| (4) |