Răspuns:
Deci....
[tex] \frac{8}{ \sqrt{200} } + \frac{10}{ \sqrt{450} } - \frac{2}{ \sqrt{18} } - \frac{2}{ \sqrt{50} } = [/tex]
[tex] \frac{8}{10 \sqrt{2} } + \frac{10}{15 \sqrt{2} } - \frac{2}{3 \sqrt{2} } - \frac{2}{5 \sqrt{2} } = [/tex]
[tex] \frac{4}{5 \sqrt{2} } + \frac{2}{3 \sqrt{2} } - \frac{2}{3 \sqrt{2} } - \frac{ \sqrt{2} }{5} = [/tex]
[tex] \frac{2 \sqrt{2} }{5} - \frac{ \sqrt{2} }{5} = [/tex]
[tex] \frac{ \sqrt{2} }{5} [/tex]
Succes....
