Practice | Hashtable

Home > Practice > Arithmetic Aptitude > Surds and Indices > Miscellaneous

1. ( $\sqrt{8}$ - $\sqrt{4}$ - $\sqrt{2}$ ) Equals to = ?

A. 2 - $\sqrt{2}$

B. $\sqrt{2}$ - 2

C. 2

D. -2

Solution:

\begin{aligned} (\sqrt{8} - \sqrt{4} - \sqrt{2}) \\ = 2 \sqrt{2} - 2 - \sqrt{2} \\ = 2 \sqrt{2} - \sqrt{2} - 2 \\ = \sqrt{2} (2 - 1) - 2 \\ = \sqrt{2} - 2 \end{aligned}

You must login to add comments. Login now.