4MA0 Foundation January 2018 Paper 2 Q23
23
(a) Simplify fully \(\dfrac{y^5 \times y^8}{y^4}\) (2)
(b) Expand and simplify \((x + 7)(x - 3)\) (2)
| Scheme | Marks |
|---|---|
| \(\dfrac{y^{13}}{y^4}\) or \(y^{(1)} \times y^8\) or \(y^5 \times y^4\) or \(y^{5 + 8 - 4}\) | M1 |
| \(y^9\) | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(x^2 + 7x - 3x - 21\) | M1 |
| \(x^2 + 4x - 21\) | A1 |
| (2) |
Notes
M1: 3 terms correct with signs or 4 terms correct ignoring signs or
\(x^2 + 4x \pm \ldots\) or
\(\ldots + 4x - 21\)