Higher June 2023 Paper 2 Q8
8
\[(a - 3)x^2 + 2b \equiv 5x^2 + 12\]Work out the values of \(a\) and \(b\). [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(a = 8\) and \(b = 6\) | B2 | B1 \(a - 3 = 5\) or \(a = 3 + 5\) or \(a = 8\) or \(2b = 12\) or \(b = 12 \div 2\) or \(b = 6\) SC1 \(a = 6\) and \(b = 8\) |
Additional guidance
| Ignore working if B2 or B1 or SC1 seen | |
| \((a - 3)x^2 = 5x^2\) with no further correct work | B0 |
| For B1 do not allow embedded values eg \(2 \times 6 = 12\) | B0 |