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1:Aria unui patrat cu diagonala de [tex]8 \sqrt 2[/tex] cm este egala cu ...cm[tex] ^{2} [/tex].
2: Aratati ca:
([tex] \sqrt7 + \sqrt14) ^{2} + (7- \sqrt2) ^{2} = (6 \sqrt2) ^{2} [/tex].


Ajutati-maa. Plss.
Dau funditaa. :**


Răspuns :

[tex]1) d=l \sqrt{2} =8 \sqrt{2} =\ \textgreater \ l=8 \\ A= l^{2} = 8^{2} =64 \\ 2) ( \sqrt{7}+ \sqrt{14} )^{2} +( 7- \sqrt{2} )^{2}=7+14 \sqrt{2} +14+49-14 \sqrt{2} +2= \\ 21+51=72=(6\sqrt{2})^{2}[/tex]