Răspuns :
[tex] \frac{1}{1- \sqrt{2} } - \frac{7}{3- \sqrt{2} } + \sqrt{18}
[/tex]
Amplificam cu conjugatele
[tex] \frac{1+ \sqrt{2} }{1-2} - \frac{7(3+ \sqrt{2}) }{3-2} +3 \sqrt{2} = -1-\sqrt{2} -21-7\sqrt{2} +3\sqrt{2} = -22-5\sqrt{2} [/tex]
Amplificam cu conjugatele
[tex] \frac{1+ \sqrt{2} }{1-2} - \frac{7(3+ \sqrt{2}) }{3-2} +3 \sqrt{2} = -1-\sqrt{2} -21-7\sqrt{2} +3\sqrt{2} = -22-5\sqrt{2} [/tex]