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[tex]3\sqrt{75}+\sqrt{300}-2\sqrt{48}=3\sqrt{25\cdot3}+\sqrt{100\cdot3}-2\sqrt{16\cdot3}=\\\\=3\sqrt{5^2\cdot3}+\sqrt{10^2\cdot3}-2\sqrt{4^2\cdot3}=3\cdot5\sqrt3+10\sqrt3-2\cdot4\sqrt3=\\\\=15\sqrt3+10\sqrt3-8\sqrt3=25\sqrt3-8\sqrt3=\boxed{17\sqrt3}[/tex]
[tex]3\sqrt{75}+\sqrt{300}-2\sqrt{48}=\\=3\sqrt{25\cdot3}+\sqrt{100\cdot3}-2\sqrt{16\cdot3}=\\=3\cdot5\sqrt{3}+10\sqrt{3}-2\cdot4\sqrt{3}=\\=15\sqrt{3}+10\sqrt{3}-8\sqrt{3}=\\=25\sqrt{3}-8\sqrt{3}=\\=\boxed{17\sqrt{3}}[/tex]