Internal problem ID [3685]
Book: Ordinary differential equations and their solutions. By George Moseley Murphy.
1960
Section: Various 32
Problem number: 960.
ODE order: 1.
ODE degree: 2.
CAS Maple gives this as type [_quadrature]
Solve \begin {gather*} \boxed {\left (x^{2}-a y\right ) \left (y^{\prime }\right )^{2}-2 y^{\prime } y x=0} \end {gather*}
✓ Solution by Maple
Time used: 0.023 (sec). Leaf size: 28
dsolve((x^2-a*y(x))*diff(y(x),x)^2-2*x*y(x)*diff(y(x),x) = 0,y(x), singsol=all)
\begin{align*} y \relax (x ) = -\frac {x^{2}}{a \LambertW \left (-\frac {x^{2} c_{1}}{a}\right )} \\ y \relax (x ) = c_{1} \\ \end{align*}
✓ Solution by Mathematica
Time used: 8.087 (sec). Leaf size: 310
DSolve[(x^2-a y[x]) (y'[x])^2-2 x y[x] y'[x]==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to c_1 \\ \text {Solve}\left [\frac {\left (2-\frac {2 \left (2 a x y(x)+x^3\right )}{\sqrt [3]{x^3} \left (x^2-a y(x)\right )}\right ) \left (\frac {\frac {6 x^3}{x^2-a y(x)}-4 x}{\sqrt [3]{x^3}}+4\right ) \left (\left (1-\frac {x \left (2 a y(x)+x^2\right )}{\sqrt [3]{x^3} \left (x^2-a y(x)\right )}\right ) \log \left (\frac {2-\frac {2 \left (2 a x y(x)+x^3\right )}{\sqrt [3]{x^3} \left (x^2-a y(x)\right )}}{\sqrt [3]{2}}\right )+\left (\frac {2 a x y(x)+x^3}{\sqrt [3]{x^3} \left (x^2-a y(x)\right )}-1\right ) \log \left (\frac {\frac {\frac {6 x^3}{x^2-a y(x)}-4 x}{\sqrt [3]{x^3}}+4}{\sqrt [3]{2}}\right )-3\right )}{18 \sqrt [3]{2} \left (-\frac {\left (2 a y(x)+x^2\right )^3}{\left (x^2-a y(x)\right )^3}+\frac {3 \left (2 a x y(x)+x^3\right )}{\sqrt [3]{x^3} \left (x^2-a y(x)\right )}-2\right )}=\frac {2\ 2^{2/3} x \log (x)}{9 \sqrt [3]{x^3}}+c_1,y(x)\right ] \\ y(x)\to 0 \\ \end{align*}