how do I simplify this?

Question

simplifying radicals

3sqrt(7)/sqrt(20x)

Answer 1

(3√7)/√(20x) 

Break down sqrt(20x) into sqrt(20) * sqrt(x)

sqrt(20) = sqrt(4) * sqrt(5)

so sqrt(20x) = 2 * sqrt(5) * sqrt(x)

Our expression now becomes 3sqrt(7)/2sqrt(5)sqrt(x)

To remove the radical from the denominator, multiply expression by sqrt(x)/sqrt(x), so now it becomes:

(3sqrt(7x))/(2x * sqrt(5))