Algebra
posted by Becca .
Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would be and the number before or after.
1. 4/Square root 20
2. Square root of 125/12n^3
3. Square root 103 /Square root 3 +Square root 2
4. 7+ square root 6 /33 square root 2

4/√20 = 4√20/20 = 1/5 √20 = 2/5 √5
√(125/n^3) = √(25/n^2) √(5/n) = 5/n √(5/n)
= 5/n √(5n/n^2) = 5/n^2 √(5n)
(√103)/(√3+√2)
= (√103)(√3√2) / (32)
= √303√3√20+3√2
= 3√23√32√5+√30
(7+√6)/(3√2)
= (7+√6)(3+√2) / (92)
= (21+3√6+7√2+√12)/7
= 1/7 (21 + 3√6 + 7√2 + 2√3) 
8*/816/16
please help 
1/3 + 3/x 1/9  9/x square