[tex]\sqrt{50} = \sqrt{25\cdot2} = \sqrt{25}\cdot\sqrt{2} = 5\sqrt{2}\\\\\sqrt{28} = \sqrt{4\cdot7} = \sqrt{4}\cdot\sqrt{7} = 2\sqrt{7}\\\\\sqrt{72} = \sqrt{36\cdot2} = \sqrt{36}\cdot\sqrt{2} = 6\sqrt{2}\\\\\sqrt{200} = \sqrt{100\cdot2} = \sqrt{100}\cdot\sqrt{2} = 10\sqrt{2}\\\\\sqrt{1800} = \sqrt{900\cdot2} =\sqrt{900}\cdot\sqrt{2} = 30\sqrt{2}[/tex]
