15.13.3 problem 3

Internal problem ID [3172]
Book : Differential Equations by Alfred L. Nelson, Karl W. Folley, Max Coral. 3rd ed. DC heath. Boston. 1964
Section : Exercise 22, page 99
Problem number : 3
Date solved : Sunday, March 30, 2025 at 01:20:20 AM
CAS classification : [[_2nd_order, _with_linear_symmetries]]

\begin{align*} y^{\prime \prime }-5 y^{\prime }+6 y&=x^{2} \end{align*}

✓ Maple. Time used: 0.003 (sec). Leaf size: 26

ode:=diff(diff(y(x),x),x)-5*diff(y(x),x)+6*y(x) = x^2; 
dsolve(ode,y(x), singsol=all);
 

\[ y = {\mathrm e}^{2 x} c_2 +{\mathrm e}^{3 x} c_1 +\frac {x^{2}}{6}+\frac {5 x}{18}+\frac {19}{108} \]

✓ Mathematica. Time used: 0.017 (sec). Leaf size: 37

ode=D[y[x],{x,2}]-5*D[y[x],x]+6*y[x]==x^2; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to \frac {x^2}{6}+\frac {5 x}{18}+c_1 e^{2 x}+c_2 e^{3 x}+\frac {19}{108} \]

✓ Sympy. Time used: 0.173 (sec). Leaf size: 29

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(-x**2 + 6*y(x) - 5*Derivative(y(x), x) + Derivative(y(x), (x, 2)),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = C_{1} e^{2 x} + C_{2} e^{3 x} + \frac {x^{2}}{6} + \frac {5 x}{18} + \frac {19}{108} \]