[tex]\sqrt{8} + \sqrt{50} +\sqrt{72}=[/tex]

[tex]\sqrt{4.2} + \sqrt{25.2} +\sqrt{36.2}=[/tex]

[tex]\sqrt{2^{2}.2 } +\sqrt{5^{2}.2 } +\sqrt{6^{2} .2}=[/tex]

[tex]2\sqrt{2} +5\sqrt{2} +6\sqrt{2}[/tex]

[tex]2+5+6\sqrt{2} =[/tex]

[tex]13\sqrt{2}[/tex]