SOLUTION: are the following numbers rational? -1/square root of 5, 13/square root of 5, square root of 2/3

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Question 882868: are the following numbers rational?
-1/square root of 5, 13/square root of 5, square root of 2/3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
-1%2Fsqrt%285%29
13%2Fsqrt%285%29
sqrt%282%2F3%29
No, they're all irrational.