Question

dauuuu coroanaaaaaaa​

Answer 1

Răspuns:

$\frac{1}{7-4\sqrt{3} }$+$\frac{1}{7+4\sqrt{3} }$=>amplificam $\frac{1}{7-4\sqrt{3} }$ cu 7+$4\sqrt{3}$ si $\frac{1}{7+4\sqrt{3} }$ cu $7-4\sqrt{3}$

=>$\frac{7+4\sqrt{3} }{7^{2} -4\sqrt{3} ^{2} } }$+$\frac{7-4\sqrt{3} }{7^{2}-4\sqrt{3} ^{2} }$=>$\frac{7+4\sqrt{3} }{49-48}$+$\frac{7-4\sqrt{3} }{49-48}$=>$\frac{14}{1}$=14

raspuns: c)Bianca