Question

Write the simplest rationalisation factor of the following surds:

$\sqrt{32}$

• A. $\sqrt{2}$
• B. $\sqrt{7}$
• C. $\sqrt{5}$
• D. $\sqrt{3}$

Answer 1

Answer: (A)

$\sqrt{2}$

$\sqrt{32}=\sqrt{16\times 2}=4\sqrt{2}$
$2=\sqrt{2}\times \sqrt{2}$
$\sqrt{2}$ is a simplest rationalization factor