June 2023 Paper 1 Q2
2 Factorise fully \(\qquad 6x^2y + 21xy\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(3xy(2x + 7)\) | B2 | B1 for any factor taken out correctly. \(3(2x^2y + 7xy)\) or \(x(6xy + 21y)\) or \(y(6x^2 + 21x)\) or \(3x(2xy + 7y)\) or \(3y(2x^2 + 7x)\) or \(xy(6x + 21)\) B1 for correct highest common factor with one term incorrect in the bracket \(3xy(a + 7)\) or \(3xy(2x + b)\) |
Additional guidance
| Condone final bracket missing | |
| Condone multiplication signs | |
| Condone changing order of terms eg \(3(2x + 7)xy\) | |
| \((3xy + 0)(2x + 7)\) or \((3xy + \quad)(2x + 7)\) or \(3xy\) and \((2x + 7)\) seen but not together | SC1 |