1MA0 Higher June 2014 Paper 1 Q25
25
(a) Rationalise the denominator of \(\dfrac{12}{\sqrt{3}}\) (2)
(b) Work out the value of \((\sqrt{2} + \sqrt{8})^2\) (2)
| Answer | Mark | Notes |
|---|---|---|
| \(4\sqrt{3}\) | 2 | M1 for \(\dfrac{12}{\sqrt{3}} \times \dfrac{\sqrt{3}}{\sqrt{3}}\) A1 for \(\dfrac{12\sqrt{3}}{3}\) oe with a rational denominator |
| Answer | Mark | Notes |
|---|---|---|
| 18 | 2 | M1 for \(\sqrt{2} \times \sqrt{2} + \sqrt{2} \times \sqrt{8} + \sqrt{8} \times \sqrt{2} + \sqrt{8} \times \sqrt{8}\) oe A1 cao OR M1 for \((\sqrt{2} + 2\sqrt{2})^2\) A1 cao |