The questions are asking m to rationalize the denominator

Question

The questions are asking m to rationalize the denominator. ( All variables represent positive real numbers).

Please show me the steps to work a problem like this out.

Question 1

sqrt(40x2)/sqrt(8x2y)

Question 2

sqrt(10y2)/sqrt(2y3)

Question 3

index 3 sqrt(12t^3)/index 3 sqrt(108t^2)

Question 4

index 3 sqrt(5/81)

 
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