[tex]\it x^2=\dfrac{4}{9}\Rightarrow \sqrt{x^2} = \sqrt{\dfrac{4}{9}} \Rightarrow |x|=\dfrac{2}{3} \Rightarrow x=\pm\dfrac{2}{3}[/tex]
[tex]\it x^2=\dfrac{16}{25}\Rightarrow \sqrt{x^2} = \sqrt{\dfrac{16}{25}} \Rightarrow |x|=\dfrac{4}{5} \Rightarrow x=\pm\dfrac{4}{5}=\pm0,8[/tex]
[tex]\it x^2=\dfrac{8}{9} \Rightarrow \sqrt{x^2}=\sqrt{\dfrac{8}{9}} \Rightarrow |x|=\dfrac{2\sqrt2}{3} \Rightarrow x=\pm\dfrac{2\sqrt2}{3}[/tex]
