Kata

A point C lies on the x-axis such that it is an equal distance from two integer coordinates (x1,y1) and (x2,y2). The y values of the two coordinates are non-negative.

Write a function "findC(coords)" which takes the two coordinates in the form [[x1,y1],[x2,y2]] and returns the x value of the point C as a string, rounded to 2 decimal places.

Example for the coordinates (-1,1) & (1,1):

findC([[-1,1],[1,1]]); // => "0.00"

find_c([[-1, 1], [1, 1]]) # => "0.00"

---

Some important notes:

Both original coordinates' y values will range from 0 to 20 inclusive.

Both original coordinates' x values will range from -20 to 20 inclusive.

Returned value must be a string rounded to exactly 2 decimal places.

If the two coordinates given are the same, then your function should return "Error: coordinates must be different"

If there is no possible solution for a given pair of coordiates, the function should return "Error: no possible solution".