5+ radical 7 over 5- radical 7 is equivalent to what?
Let's take a look at how to solve these kinds of problems.
I'm assuming the problem is this:
5 + √7
------
5 - √7
Multiply both top and bottom by the equivalent of 1 to get rid of the radical in the denominator:
(5 + √7)(5 + √7)
----------------
(5 - √7)(5 + √7)
Let's multiply using FOIL:
25 + 5√7 + 5√7 + 7
------------------
25 + 5√7 - 5√7 - 7
Combine like terms:
32 + 10√7
---------
18
Factor out 2 from both the top and bottom:
2(16 + 5√7)
-----------
2(9)
Cancel out the 2 from top and bottom.
We end up with this:
16 + 5√7
--------
9
And there you have it!
I hope this helped.