Ionic

How do I use approximations here to get ans???? Pls help

@abcd
in first eq approx x as 0, get S.
put in second and and take denom x as small approximated to 0

@nukitapuyol can u pls send written sol??
But why should x~0 in first eq ...as either
's' or 'sx' must ~ 0 na??

approimation of x gave me s^2 . so i did .

@nukitapuyol ya it gave an ans ...but how is it correct?
Pls explain how u can consider x=0
Waysc the logic?

@abcd
see we approx as we know x is going to be small in comparsion with s.