exam Maths Puzzle Numerical Ability

How do you deal with square roots within square roots, for example

sqrt(4 + 2sqrt3)/sqrt2?

Thank you for your help!

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exam Other Question

Here is another one i have been stuck on. Thank you for all of your help.
2(3x+2)+4 i couldnt find the type of question it is but it has to do with variables on both sides of the equation 4-2w=6w