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Razvancrisan91
a fost răspuns

Aratati ca numarul a=[tex] 7\sqrt{2}-2 \sqrt{15}( \sqrt{30}-\sqrt{60})+\sqrt{24}(15supra \sqrt{3}-7supra \sqrt{2}[/tex] este???

Răspuns :

[tex]a=7\sqrt2-2\sqrt450+2\sqrt900+2\sqrt6(\frac{15\sqrt3}{2}-\frac{7\sqrt2}{2})\\ a=7\sqrt2-30\sqrt2+60+15\sqrt{18}-7\sqrt{12}\\ a=7\sqrt2-30\sqrt2+60+45\sqrt2-14\sqrt3\\ a=22\sqrt2-14\sqrt3+60[/tex]

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