<PRE><B>Question 60039</B>
under the radical sign it says 75x12(to the twelfth)y5(to the fifth).
Rewrite the radicand: Separate it into two factors, one of which is a 
perfect square, as follows:
=sqrt[(25*x^12y^4)(3y)]
Take the square root of the perfect square factor, as follows:
=5*x^6*y^2 sqrt(3y) 

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one of the other ones says 

4 as the index, then under the radical sign 48x3(to the third)y20(to the twentith) 

4th root of (48x^3y^20)
Separate the radicand into two factors, one of which is a perfect 4th power.
=4th root of [(16y^20))(3x^3)]
Take the 4th root of the pervect 4th power factor to get:
=2y^5[4th root of (3x^3)]
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Cheers,
Stan H.
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