Chapter 2.6, Problem 12P

Exact Equations. In each of Problem $1$ through $12$:

Determine whether the equation is exact. If it is exact, then:

Solve the equation.

Use a computer to draw several integral curves.

$\frac{x}{{\left(x^2+y^2\right)}^{3/2}}+\frac{y}{{\left(x^2+y^2\right)}^{3/2}}y\text{'}=0$.