4MA0 Foundation January 2016 Paper 2 Q22
22
(a) Expand \(x(x + 2)\) (1)
(b) Simplify \(6t - 3 - 8t + 7\) (2)
(c) Solve the inequality \(4x - 7 \gt 3\) (2)
| Scheme | Marks |
|---|---|
| \(x^2 + 2x\) or \(2x + x^2\) or \(x2 + x^2\) Answer: \(x^2 + 2x\) | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| \(-2t + 4\) Answer: \(-2t + 4\) | B2 |
| (2) |
Notes
B2: B1 for \(-2t\) or 4
| Scheme | Marks |
|---|---|
| \(4x \gt 3 + 7\) or \(4x \gt 10\) | M1 |
| \(x \gt 2.5\) | A1 |
| (2) |
Notes
M1: for \(4x \gt 3 + 7\) or \(4x \gt 10\) or
\(4x = 3 + 7\) or \(4x = 10\) or \(x = 2.5\) or \(x \lt 2.5\)
or an answer of 2.5 following \(x \gt 2.5\) in working
A1: allow \(x \gt \dfrac{10}{4}\) oe
must have correct inequality sign