Expert Integration Help: Solving (dx)/(a-bx^2) with Wolfram | Tips & Tricks

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Factor the denominator into (sqrt(a) - sqrt(b)*x)(sqrt(a) + sqrt(b)*x), and then use partial fraction decomposition to rewrite the integrand as A/(sqrt(a) - sqrt(b)*x) + B/(sqrt(a) + sqrt(b)*x).
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply . Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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