Arrazionalizazio (matematika): berrikuspenen arteko aldeak

:<math>\frac{2} {5+\sqrt{8}} = \frac{2\cdot(5-\sqrt{8})} {(5+\sqrt{8})\cdot(5-\sqrt{8})}= \frac{10-2\sqrt{8}} {5^2-\sqrt{8}^2}= \frac{10-2\sqrt{8}} {25-8}= \frac{10-2\sqrt{8}} {17}</math>

 

 

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