Internal problem ID [4147]
Book: Ordinary differential equations and their solutions. By George Moseley Murphy.
1960
Section: Various 31
Problem number: 911.
ODE order: 1.
ODE degree: 2.
CAS Maple gives this as type [[_homogeneous, `class A`], _dAlembert]
\[ \boxed {{y^{\prime }}^{2} x^{2}+\left (y+2 x \right ) y y^{\prime }+y^{2}=0} \]
✓ Solution by Maple
Time used: 0.109 (sec). Leaf size: 124
dsolve(x^2*diff(y(x),x)^2+(2*x+y(x))*y(x)*diff(y(x),x)+y(x)^2 = 0,y(x), singsol=all)
\begin{align*} y \left (x \right ) &= -4 x \\ y \left (x \right ) &= 0 \\ y \left (x \right ) &= \frac {2 c_{1}^{2} \left (-\sqrt {2}\, c_{1} +x \right )}{-2 c_{1}^{2}+x^{2}} \\ y \left (x \right ) &= \frac {2 c_{1}^{2} \left (\sqrt {2}\, c_{1} +x \right )}{-2 c_{1}^{2}+x^{2}} \\ y \left (x \right ) &= \frac {c_{1}^{2} \left (\sqrt {2}\, c_{1} -2 x \right )}{2 c_{1}^{2}-4 x^{2}} \\ y \left (x \right ) &= \frac {c_{1}^{3} \sqrt {2}+2 x \,c_{1}^{2}}{-2 c_{1}^{2}+4 x^{2}} \\ \end{align*}
✓ Solution by Mathematica
Time used: 0.698 (sec). Leaf size: 63
DSolve[x^2 (y'[x])^2+(2 x+y[x])y[x] y'[x]+y[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -\frac {e^{4 c_1}}{-x+e^{2 c_1}} \\ y(x)\to \frac {e^{4 c_1}}{4 \left (4 x+e^{2 c_1}\right )} \\ y(x)\to 0 \\ y(x)\to -4 x \\ \end{align*}