Laws of Indices & Surds (Edexcel A-Level Mathematics): Quizzes

They are bad presentation by convention

Multiply by $\frac{\sqrt{n}}{\sqrt{n}}$

Simplified surd form

$\frac{3\sqrt{2}}{2}$

$2\sqrt{7}$

Simplify the surds

$3\sqrt{5}$

$a - b\sqrt{c}$

$9 - 2$

$\frac{2 + \sqrt{7}}{2 + \sqrt{7}}$

Examiners prefer positive denominators

$\frac{7\sqrt{6}}{30}$