[tex]\displaystyle\bf\\\sqrt{0,\!32(1)}=\sqrt{\frac{321-32}{900}}=\sqrt{\frac{289}{900}}=\sqrt{\frac{17^2}{30^2}}=\sqrt{\left(\frac{17}{30}\right)^2}=\boxed{\bf\frac{17}{30}}\\\\\\\sqrt{0,\!58(7)}=\sqrt{\frac{587-58}{900}}=\sqrt{\frac{529}{900}}=\sqrt{\frac{23^2}{30^2}}=\sqrt{\left(\frac{23}{30}\right)^2}=\boxed{\bf\frac{23}{30}}[/tex]
