Hey, I got stuck on the following differential equation. Given $\displaystyle y = 0$ when $\displaystyle x = 2$, solve $\displaystyle \dfrac{x}{y}\cdot\dfrac{dx}{dy} = \dfrac{x^2+1}{y^2+1}$.

I can't separate the variables and I couldn't turn it into a form that I can take an integrating factor.