X squared over 5 gives you what?

Brent wants to know what is 5 x 1/2

With number 11 ( show how you got the answer)

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)