Question

please help me out with this​

Answer 1

$\frac{2 \sqrt{2} ( \sqrt{10} - \sqrt{5} )}{8}$

$\frac{4 \sqrt{5} - (2 \times \sqrt{2} \times \sqrt{5}) }{8}$

Now just put the values and get the answer.

Hope it helps. Please tell if there is any correction in the answer, before reporting.