this method 2 is rite

here i go

q is dx/(1-x)^3/2*(1+x)^1/2

 dx / [(1-x) / (1+x) ]^(3/2) * (1+x)^2

 

so nw put (1-x/1+x)=t

so u get

-2/(1+x)^2dx=dt

so u can integrate it nw