\[\ x^{2} < 1,7x\]
\[x^{2} - 1,7x < 0\]
\[x(x - 1,7) < 0\]
\[x(x - 1,7) = 0\]
\[x = 0\ \ \ \ \ \ \ x - 1,7 = 0\ \ \ \ \]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = 1,7\]
\[Ответ:\ \ x \in (0;1,7).\]