Răspuns:
[tex] \frac{ \sqrt{2} - 1}{ \sqrt{8} } [/tex]
[tex] \sqrt{8} = 2 \sqrt{2} [/tex]
[tex] \frac{ 2\sqrt{2} - 1 }{2 \sqrt{2} } [/tex]
Amplificam cu radical din 2
[tex] \frac{ \sqrt{2} (2\sqrt{2} - 1) }{2 \sqrt{2} \times \sqrt{2} } [/tex]
[tex] \frac{2 \times 2 - \sqrt{2} }{2 \times 2} [/tex]
[tex] \frac{4 - \sqrt{2} }{4} [/tex]
[tex] \frac{4}{4} - \frac{ \sqrt{2} }{4} [/tex]
[tex]1 - \frac{ \sqrt{2} }{4} [/tex]
Sper ca te-am ajutat :)
