\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) ={\frac {-by \left( x \right) a+{b}^{2}+ab+{b}^{2}x-ba\sqrt {x}-{a}^{2}}{a \left( -ay \left( x \right) +b+a+bx-a\sqrt {x} \right) }}=0}
\]