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OpenStudy (anonymous):
(1/(x+sq.rt.(x^2-5)))(1+(x/sq.rt(x^2-5))-->(1/(x+sq.rt.(x^2-5)))(sq.rt.(x^2-5x)+x)(sq.rt(x^2-5)....why? I have the first part, but then I don't understand the second part, more specifically why (1/(x+sq.rt.(x^2-5)))(x/sq.rt(x^2-5))--->(sq.rt.(x^2-5x)+x)(sq.rt(x^2-5)
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