Foundation November 2023 Paper 1 Q18
18 Work out \(\quad \sqrt{100 - 4(2^2 + 5)}\) [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \((2^2 + 5 =)\ 9\) or \(4 \times 2^2 + 4 \times 5\) or \(-4 \times 2^2 + {-4} \times 5\) or \((-)36\) | M1 | oe |
| \(100 -\) their 36 or 64 | M1dep | oe |
| 8 | A1 | accept \(\pm 8\) |
Additional guidance
| \(100 - 4 \times 4 + 4 \times 5\) or \(100 - 16 + 20\) not recovered | M0M0A0 |