Please simplify.picture attached. #1

I'll teach you how to simplify 4/sqrt 5

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4/sqrt 5

Multiply by the conjugate:

4 sqrt 5/sqrt 5 sqrt 5

sqrt 5 * sqrt 5= 5

Your Answer Is

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The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.