[tex]2 \sqrt{18} \times \sqrt{48} \div \sqrt{72} = [/tex]

[tex]2 \sqrt{18} \times \sqrt{48} \div \sqrt{72} \\ = 2 \sqrt{9 \times 2} \times \sqrt{16 \times 3} \div \sqrt{36 \times 2} \\ = (2 \times 3 \sqrt{2}) \times 4 \sqrt{3} \div 6 \sqrt{2} \\ = 6 \sqrt{2} \times 4 \sqrt{3} \div 6 \sqrt{2} \\ = 6 \times 4 \div 6 \times \sqrt{2} \times \sqrt{3} \div \sqrt{2} \\ = 4 \sqrt{3} [/tex]