Resposta:
[tex]a) \sqrt{2}.\sqrt{18}\\ \\ \sqrt{2}.\sqrt{2.9}\\ \\ \sqrt{2}.\sqrt{2}.\sqrt{9}\\ \\ \sqrt{2.2}.\sqrt{9}\\ \\ \sqrt{4}.\sqrt{9}\\ 2.3\\ \\ 6[/tex]
b)
[tex]\frac{\sqrt{6} }{\sqrt{18} } =\frac{\sqrt{6} }{\sqrt{6.3} }=\frac{\sqrt{6} }{\sqrt{6}.\sqrt{3} }\\ \\ \frac{\sqrt{6} }{\sqrt{6} }.\frac{1}{\sqrt{3} }=1.\frac{1}{\sqrt{3} }=\frac{1}{\sqrt{3} }\\ \\ \frac{1}{\sqrt{3} }.\frac{\sqrt{3} }{\sqrt{3} } =\frac{\sqrt{3} }{\sqrt{9} }=\frac{\sqrt{3} }{3}[/tex]
bons estudos!
