exam Maths Puzzle Numerical Ability

I am having trouble with this one. Any help is appreciated.

Simplify

Square root of 3x/2

Thanks

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exam Other Question
The area of a rectangle is 40 in.2. If the length is x+4in. and the width is x-2., what are the dimensions of the rectangle? Use Cramer Rule.

x-3y+z=-2
x+2y=8
2x-y=1