Explicație pas cu pas:
[tex]\frac{16}{4 \sqrt{3} } = \frac{4}{ \sqrt{3} } = \frac{4 \sqrt{3} }{ \sqrt{3} \times \sqrt{3} } = \frac{4 \sqrt{3} }{3} \\ [/tex]
[tex] \frac{28}{ \sqrt{14} } = \frac{28 \sqrt{14} }{ \sqrt{14} \times \sqrt{14} } = \frac{28 \sqrt{14} }{14} = 2 \sqrt{14} \\ [/tex]
[tex]\frac{ - 21}{3 \sqrt{7}} = - \frac{7}{ \sqrt{7} }= - \frac{7 \sqrt{7} }{ \sqrt{7} \times \sqrt{7} } = - \frac{7 \sqrt{7} }{7} = - 7 \\ [/tex]
[tex]\frac{ \sqrt{2} }{ \sqrt{3} } = \frac{ \sqrt{2} \times \sqrt{3} }{ \sqrt{3} \times \sqrt{3} } = \frac{ \sqrt{6} }{3} \\ [/tex]
[tex]\frac{ \sqrt{6} }{3 \sqrt{2} } = \frac{ \sqrt{3} \times \sqrt{2} }{3 \sqrt{2}} = \frac{ \sqrt{3} }{3} \\ [/tex]
[tex]\frac{5 \sqrt{3} }{4 \sqrt{5} } = \frac{5 \sqrt{3} \times \sqrt{5} }{4 \sqrt{5} \times \sqrt{5} } = \frac{5 \sqrt{15} }{4 \times 5} = \frac{ \sqrt{15} }{4} \\ [/tex]
