June 2022 Paper 2 Q1
1 Factorise fully \(\qquad 12w + 18w^2\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(6w(2 + 3w)\) | B2 | B1 partial factorisation eg \(3w(4 + 6w)\) or \(2w(6 + 9w)\) or \(w(12 + 18w)\) or \(6(2w + 3w^2)\) or \(3(4w + 6w^2)\) or \(2(6w + 9w^2)\) |
Additional guidance
| B1 may be awarded for correct work with no, or incorrect answer, even if this is seen amongst multiple attempts | |
| \(6w(2 + 3w)\) seen with further simplification | B1 |
| \(1(12w + 18w^2)\) | B0 |
| \((2 + 3w)\) is equivalent to \((3w + 2)\) etc | |
| Condone \((6w + 0)\) for \(6w\) etc | |
| Condone use of multiplication signs in B2 or B1 responses eg \(6w \times (2 + 3w)\) or \(w \times 6 \times (2 + 3w)\) | B2 |
| Condone missing closing bracket in B2 or B1 responses eg \(3w(4 + 6w\) | B1 |
| Condone \(w3\) for \(3w\) etc for B1 eg \(w3(4 + 6w)\) | B1 |
| \(w6(2 + 3w)\) | B1 |
| Ignore any attempt to ‘solve’ after B2 or B1 seen | |
| Responses involving fractions or surds are not acceptable |