Răspuns :
2[tex] \sqrt{2} [/tex] +3[tex] \sqrt{2} [/tex] - 4[tex] \sqrt{2} [/tex] +[tex] \sqrt{2} [/tex] = 6[tex] \sqrt{2} [/tex] - 3[tex] \sqrt{2} [/tex] = 3[tex] \sqrt{2} [/tex]
[tex] \sqrt{8} + \sqrt{18} - \sqrt{32} + \sqrt{2} =2 \sqrt{2} +3 \sqrt{2} -4 \sqrt{2} + \sqrt{2} = \\ =5 \sqrt{2} -4 \sqrt{2} + \sqrt{2} = \sqrt{2} + \sqrt{2} =2 \sqrt{2} [/tex]