Higher June 2018 Unit 2 Q15
15. Express the following as a single fraction in its simplest form. [4]
\[\frac{2}{3x - 5} - \frac{7}{11x - 13}\]| Scheme | Marks | Comments |
|---|---|---|
| Sight of \(22x - 26 - 21x + 35\) or equivalent. | B2 | Award B1 for sight of \(2(11x - 13) - 7(3x - 5)\) OR three of the four terms correct. |
| Denominator of \((3x - 5)(11x - 13)\) | B1 | Must be seen or stated as the denominator. |
| \(\dfrac{x + 9}{(3x - 5)(11x - 13)}\) or \(\dfrac{x + 9}{33x^2 - 94x + 65}\) | B1 | CAO. Mark final answer. |