How do you simplify 5 over square root of 7?

2 Answers
Pythagoras
Sep 20, 2015

You cannot.

Explanation:

Let's see,
frac(5)(sqrt(7))
5 is a prime number (you cannot make 5 by multiplying two integers).
7 is also a prime number.
Therefore you cannot simplify this fraction further.
You can rewrite it though.
frac(5)(sqrt(7)) = 5*7^(frac(-1)(2))

George C.
Sep 20, 2015

5/sqrt(7) = (5sqrt(7))/7

Explanation:

You cannot simplify it much, but you can rationalise the denominator by multiplying both numerator and denominator by sqrt(7):

5/sqrt(7) = (5sqrt(7))/(sqrt(7)sqrt(7)) = (5sqrt(7))/7

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