19.16 problem 529

Internal problem ID [3781]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 19
Problem number: 529.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class A`], _rational, [_Abel, `2nd type`, `class B`]]

\[ \boxed {x \left (-y+x \right ) y^{\prime }+3 y x -y^{2}=-2 x^{2}} \]

Solution by Maple

Time used: 0.031 (sec). Leaf size: 59

dsolve(x*(x-y(x))*diff(y(x),x)+2*x^2+3*x*y(x)-y(x)^2 = 0,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = \frac {c_{1} x^{2}-\sqrt {2 c_{1}^{2} x^{4}+1}}{c_{1} x} y \left (x \right ) = \frac {c_{1} x^{2}+\sqrt {2 c_{1}^{2} x^{4}+1}}{c_{1} x} \end{align*}

Solution by Mathematica

Time used: 0.724 (sec). Leaf size: 99

DSolve[x(x-y[x])y'[x]+2 x^2+3 x y[x]-y[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to x-\frac {\sqrt {2 x^4+e^{2 c_1}}}{x} y(x)\to x+\frac {\sqrt {2 x^4+e^{2 c_1}}}{x} y(x)\to x-\frac {\sqrt {2} \sqrt {x^4}}{x} y(x)\to \frac {\sqrt {2} \sqrt {x^4}}{x}+x \end{align*}