Răspuns:
[tex]\sqrt{2\frac{7}{9} } =\sqrt{\frac{2*9+7}{9} } =\sqrt{\frac{25}{9} } =\frac{5}{3} \\\\\sqrt{5\frac{19}{25}} =\sqrt{\frac{5*25+19}{25} } =\sqrt{\frac{144}{25} } =\frac{12}{5} \\\\\sqrt{1\frac{32}{49} } =\sqrt{\frac{1*49+32}{49} } =\sqrt{\frac{81}{49} } =\frac{9}{7}[/tex]
