Internal problem ID [7760]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 180.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [[_homogeneous, class D], _rational, _Riccati]
Solve \begin {gather*} \boxed {\left (a \,x^{2}+x b +c \right ) \left (x y^{\prime }-y\right )-y^{2}+x^{2}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.016 (sec). Leaf size: 58
dsolve((a*x^2+b*x+c)*(x*diff(y(x),x)-y(x)) - y(x)^2 + x^2=0,y(x), singsol=all)
\[ y \relax (x ) = -\tanh \left (\frac {c_{1} \sqrt {4 a c -b^{2}}+2 \arctan \left (\frac {2 a x +b}{\sqrt {4 a c -b^{2}}}\right )}{\sqrt {4 a c -b^{2}}}\right ) x \]
✓ Solution by Mathematica
Time used: 1.231 (sec). Leaf size: 62
DSolve[(a*x^2+b*x+c)*(x*y'[x]-y[x]) - y[x]^2 + x^2==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -x \tanh \left (\frac {2 \text {ArcTan}\left (\frac {2 a x+b}{\sqrt {4 a c-b^2}}\right )}{\sqrt {4 a c-b^2}}+c_1\right ) \\ y(x)\to -x \\ y(x)\to x \\ \end{align*}