Salut!
[tex]\sqrt{18}-\sqrt{32} -\sqrt{50} +\sqrt{72} =[/tex]
[tex]3\sqrt{2} -4\sqrt{2} -5\sqrt{2} +6\sqrt{2} =[/tex]
[tex](3-4-5+6)\sqrt{2} =[/tex]
[tex]0\sqrt{2} =0[/tex]
-Luke48
