(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Easy question about the root (of a real number)

Hi, i'm a bit embarresed to ask this but does anybody know how to get this:

[tex]\sqrt{3 - 2\sqrt{2}} = \sqrt{2} - 1[/tex]

?

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# Easy question about the root (of a real number)

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