\begin{exerciseStatement}
Explain how to find the particular solution to each given IVP.
\begin{enumerate}[(a)]
\item \[ 0 = -{x''} - 3 \, {x} + 4 \, {x'} \hspace{2em}
{x} (0)= 4 ,
{x} '(0)= 10 \]
\item \[ -100 \, {y} = {y''} \hspace{2em}
{y} (0)= 3 ,
{y} '(0)= -30 \]
\end{enumerate}
\end{exerciseStatement}
\begin{exerciseAnswer}
\[ {x} = 3 \, e^{\left(3 \, t\right)} + e^{t} \]\[ {y} = 3 \, \cos\left(10 \, t\right) - 3 \, \sin\left(10 \, t\right) \]
\end{exerciseAnswer}