Resposta :
[tex]1) 5\sqrt{2}[/tex]
[tex]5\sqrt{2} = \sqrt{2\times5^{2}} = \sqrt{2\times25}} = \sqrt{50}[/tex]
[tex]2) 2\sqrt{7}[/tex]
[tex]7\sqrt{2} = \sqrt{2\times7^{2}} = \sqrt{2\times49}} = \sqrt{98}[/tex]
[tex]3) 3\sqrt{5}[/tex]
[tex]3\sqrt{5} = \sqrt{5\times3^{2}} = \sqrt{5\times9}} = \sqrt{45}[/tex]
[tex]4) 7\sqrt{5}[/tex]
[tex]7\sqrt{5} = \sqrt{5\times7^{2}} = \sqrt{5\times49}} = \sqrt{245}[/tex]
[tex]5) 4\sqrt{2}[/tex]
[tex]4\sqrt{2} = \sqrt{2\times4^{2}} = \sqrt{2\times16}} = \sqrt{32}[/tex]
[tex]6) 10\sqrt{2}[/tex]
[tex]10\sqrt{2} = \sqrt{2\times10^{2}} = \sqrt{2\times100}} = \sqrt{200}[/tex]
[tex]7) 2\sqrt{2}[/tex]
[tex]2\sqrt{2} = \sqrt{2\times2^{2}} = \sqrt{2\times4}} = \sqrt{8}[/tex]
[tex]8) x\sqrt{7}[/tex]
[tex]x\sqrt{7} = \sqrt{7\times x^{2}}[/tex]