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|√5-2√2|+|√5-√2| este modul!

Răspuns :

[tex]|\sqrt5-2\sqrt2|+|\sqrt5-\sqrt2|=|\sqrt5-\sqrt8|+|\sqrt5-\sqrt2|=\\ \sqrt8-\sqrt5+\sqrt5-\sqrt2=2\sqrt2-\sqrt5+\sqrt5-\sqrt2=\sqrt2 [/tex]
|√5-2√2|+|√5-√2| = |√5 -√8| + |√5-√2| = √8-√5+√5-√2 = 2√2-√5+√5-√2 = √2

2√2 = √2²*2 = √4*2 =√8