Question

8-4rad2+4rad2+4rad6-2rad2=

Answer 1

$8 - 4 \sqrt{2} + 4 \sqrt{2} + 4 \sqrt{6} - 2 \sqrt{2} = \\ = 8 + 4 \sqrt{6} - 2 \sqrt{2}$

Answer 2

8 - 4√2 + 4√2 + 4√6 - 2√2 =  8 - 2√2 ( 2√3 - 1 )

= 8 - 4√6 - 2√2 =

= 2 × ( 4 - 2√6 - √2 )