Resposta :
[tex]\sqrt{5}x^2+3x=0\Longrightarrow x(\sqrt{5}x+3)=0\\\\\Longrightarrow\begin{cases}x_1=0\\\sqrt{5}x+3=0
\rightarrow\sqrt{5}x=-3\rightarrow x_2=\dfrac{-3}{\sqrt{5}}\end{cases}\\\\\\
S=\{\dfrac{-3}{\sqrt{5}},\;0\}[/tex]