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How can i reduce this equation:

(Nd-Na)*[B*sqrt((Nd-Na)^2) + n^2) - sqrt((Na-Nd)^2) + n^2)]

into this:

(B-1)*(Nd-Na) + (B+1)*sqrt(Nd-Na)^2) + n^2)?

I'm totally depressed, i'm always stocked in sqrt part of the equation:

if there's a techniques in dealing this kind of equation please let me know. thanks.

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# Reducing a mathematical expression

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