Răspuns :

Mariusgabriel778id

[tex]3*(\sqrt{20}+\sqrt{3} ) - \sqrt{3} *(\sqrt{5}+3 )= 3*2\sqrt{5}+3\sqrt{3} -\sqrt{15} -3\sqrt{3} =\\6\sqrt{5} -\sqrt{15}[/tex]

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