BLablabla: 2√2(2√8+√2)
start by expanding the brackets in the usual way
2root2*2root8 + 2root2*root2
= 2 x 2 x root2roo8 + 2root(2x2)
= 4 x root(2x8) + 2 x 2
= 4 x root 16 + 4
= 4 x 4 + 4
= 16+4
= 20
I have done this in lots of steps to try and help you to understand.
I wouldn't usually use more than a couple of steps.
+118654 
