\[y = \frac{3x - 7}{\sqrt{5x + 10x^{2}}}\]
\[5x + 10x^{2} > 0\]
\[5x(1 + 2x) = 0\]
\[x = 0,\ \ x = - 0,5\]
\[Ответ:( - \infty;\ - 0,5) \cup (0;\ + \infty).\]