Răspuns:
[tex] (\frac{6}{3 \sqrt{5} } - \frac{3}{2 \sqrt{5} } + \frac{1}{4 \sqrt{5} } ) \div \frac{15}{2 \sqrt{10} } = \\ ( \frac{24 - 18 + 3}{12 \sqrt{5} } ) \times \frac{2 \sqrt{10} }{15 } = \\ \frac{9}{12 \sqrt{5} } \times \frac{2 \sqrt{10} }{15} = \\ \frac{3}{4 \sqrt{5} } \times \frac{2 \sqrt{10} }{15} = \frac{1}{2} \times \frac{ \sqrt{2} }{5} = \frac{ \sqrt{2} }{10} [/tex]
