1MA0 Higher June 2013 Paper 2 Q18
18 Make \(p\) the subject of the formula \[y = 3p^2 - 4\] (3)
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(3p^2 = y + 4\) \(p^2 = \dfrac{y + 4}{3}\) | \(p = \sqrt{\dfrac{y + 4}{3}}\) | 3 | M1 for clear intention to add 4 to both sides or divide all terms by 3 (with at least 3 terms) M1 for clear intention to find the square root from \(p^2\) = (expression in \(y\)) A1 for \(p = \sqrt{\dfrac{y + 4}{3}}\) oe (accept \(\pm\) a correct root) |