\(\dfrac{3x^2+7x-10}{x}=0\left(x\ne0\right)\)
\(\Leftrightarrow3x^2+7x-10=0\)
\(\Leftrightarrow3x^2-3x+10x-10=0\)
\(\Leftrightarrow3x\left(x-1\right)+10\left(x-1\right)=0\)
\(\Leftrightarrow\left(x-1\right)\left(3x+10\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=1\left(n\right)\\x=-\dfrac{10}{3}\left(n\right)\end{matrix}\right.\)