Question

Am atasat niste screenshot-uri, Raspundeti la ele, daca dati si explicatia, este si mai bine.

Answer 1

1. $\frac{3\sqrt{5} - 3\sqrt{2} }{\sqrt{5} - \sqrt{2} }$ = $\frac{3(\sqrt{5}-\sqrt{2})}{\sqrt{5}-\sqrt{2}}$ = $\frac{3}{1}$ = 3

2. $\frac{\sqrt{3}*\sqrt{7}-\sqrt{3}*\sqrt{2}}{\sqrt{7}-\sqrt{2}}$ = $\frac{\sqrt{3}*(\sqrt{7}-\sqrt{2})}{\sqrt{7}-\sqrt{2}}$ = $\sqrt{3}$

3. $\frac{\sqrt{2}*(\sqrt{13}-\sqrt{3}-\sqrt{7})}{\sqrt{13}-\sqrt{3}-\sqrt{7}}$ = $\sqrt{2}$

4. $\frac{(\sqrt{5})^{3}}{\sqrt{5}}-\frac{\sqrt{4}*\sqrt{7} }{\sqrt{7} }+\frac{\sqrt{2}*\sqrt{16}}{\sqrt{2}}$ = $\sqrt{5}^{2}-\sqrt{4}+\sqrt{16}$ = 25 - 2 + 4 = 27

5. $\frac{\sqrt{16}*(\sqrt{5}+\sqrt{2}) }{\sqrt{5}+\sqrt{2}}-\frac{\sqrt{9}*(\sqrt{7}-\sqrt{3} ) }{\sqrt{7}-\sqrt{3}}$ = $\sqrt{16} - \sqrt{9}$ = 4 - 3 = 1