Internal problem ID [5521]
Book: Differential Equations: Theory, Technique, and Practice by George Simmons, Steven Krantz.
McGraw-Hill NY. 2007. 1st Edition.
Section: Chapter 2. Second-Order Linear Equations. Section 2.1. Linear Equations with Constant
Coefficients. Page 62
Problem number: 1(f).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _missing_x]]
Solve \begin {gather*} \boxed {y^{\prime \prime }-9 y^{\prime }+20 y=0} \end {gather*}
✓ Solution by Maple
Time used: 0.003 (sec). Leaf size: 17
dsolve(diff(y(x),x$2)-9*diff(y(x),x)+20*y(x)=0,y(x), singsol=all)
\[ y \relax (x ) = {\mathrm e}^{4 x} c_{1}+c_{2} {\mathrm e}^{5 x} \]
✓ Solution by Mathematica
Time used: 0.002 (sec). Leaf size: 20
DSolve[y''[x]-9*y'[x]+20*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to e^{4 x} \left (c_2 e^x+c_1\right ) \\ \end{align*}