$$
\begin{gathered}
f(x)=R(x,\sqrt{ax^{2}+bx+c}) \Rightarrow


\begin{cases}
c > 0 \rightarrow tx \pm \sqrt{c} \\
a > 0 \rightarrow t \pm \sqrt{a}x \\
\Delta > 0 \rightarrow t(x-x_{1})
\end{cases}
\end{gathered}


$$