Răspuns: [tex]\bf \red{\underline{-20\sqrt{2} }}[/tex]
Explicație pas cu pas:
[tex]\bf 4\sqrt{72} -\sqrt{18}-2\sqrt{128}-5\sqrt{50}=[/tex]
[tex]\bf 4\sqrt{2^3\cdot 3^2} -\sqrt{2\cdot 3^2}-2\sqrt{2^7}-5\sqrt{2\cdot 5^2}=[/tex]
[tex]\bf 4\cdot2\cdot3\sqrt{2} -3\sqrt{2}-2\cdot2^3\sqrt{2}-5\cdot5\sqrt{2}=[/tex]
[tex]\bf 24\sqrt{2} -3\sqrt{2}-16\sqrt{2}-25\sqrt{2}=\red{\underline{-20\sqrt{2} }}[/tex]
