Răspuns :
[tex] \frac{15}{2 \sqrt{3} } = \frac{15}{2 \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{15 \sqrt{3} }{2 \times 3} = \frac{15 \sqrt{3} }{6} = \frac{5 \sqrt{3} }{2} [/tex]
[tex] \frac{15}{2 \sqrt{3} } = \frac{15}{2 \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{15 \sqrt{3} }{2 \times 3} = \frac{15 \sqrt{3} }{6} = \frac{5 \sqrt{3} }{2} [/tex]