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(r5 - 2 ) la a 2 a + r50


R= radical



Răspuns :

[tex]( \sqrt{5}-2) ^{2} +5 \sqrt{2} =5-4 \sqrt{5} +4+5 \sqrt{2} =9+ 5\sqrt{2}-4\sqrt{2} [/tex]
[tex]( \sqrt{5}-2)^2 + \sqrt{50} = 5-4 \sqrt{5} +4 + 5 \sqrt{2} = 9+4\sqrt{5}+5 \sqrt{2}[/tex]