Răspuns:
[tex]x^{2}[/tex]=[tex]\sqrt{(1-\sqrt{2})^{2} }[/tex]+[tex]\sqrt{(1+\sqrt{2})^{2} }[/tex]
[tex]x^{2}[/tex]=[tex]\sqrt{2}[/tex]-1+1+[tex]\sqrt{2}[/tex]
redu -1 cu +1
[tex]x^{2}[/tex]=[tex]\sqrt{2}[/tex]+[tex]\sqrt{2}[/tex]
[tex]x^{2}[/tex]=2[tex]\sqrt{2}[/tex]
x=±[tex]\sqrt{2\sqrt{2}[/tex]
x=±[tex]\sqrt[4]{8}[/tex]
