Foundation June 2017 Paper 1 Q7
7
(a) Simplify.\[7t - 6u + 5t - 4u\]
[2]
(b) Factorise.\[5v + 20w\]
[1]
(c) Solve by factorising.\[x^2 + 10x + 21 = 0\]
[3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(12t - 10u\) or \(2(6t - 5u)\) cao | 2 | B1 for \(12t\) or \(-10u\) in final answer | \(12t + -10u\) scores B1 |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(5(v + 4w)\) | 1 | Condone omission of final bracket | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(-3\) and \(-7\) | 3 | M2 for \((x + 3)\) and \((x + 7)\) M1 for \((x + a)\) and \((x + b)\) where \(ab = 21\) or \(a + b = 10\) B1 ft their quadratic factors If 0 scored SC1 for answer \(\pm 7\) and \(\pm 3\) | ft their quadratic factors condone omission of final bracket |