Using the properties of proportion, solve for x: √a+x+√a−x√a+x−√a−x=b
By using the componendo and dividendo, we get 2√a+x2√a+x=b+1b+1
Now squaring both sides, we get a+xa−x=b2+1+2bb2+1−2b
Again use componendo and dividend, to get the value of x.
X=2abb2+1