Given dydx=2xy\frac{dy}{dx} = \frac{2x}{y}dxdy=y2x, what is the result of separating the variables?
ydy=2xdxy dy = 2x dxydy=2xdx
ydx=2xdyy dx = 2x dyydx=2xdy
dy/y=2xdxdy/y = 2x dxdy/y=2xdx
ydy=xdxy dy = x dxydy=xdx