Question Number 168909 by LEKOUMA last updated on 21/Apr/22
$${Resolve}\: \\ $$$$\left(\mathrm{1}−{x}^{\mathrm{2}} {y}\right){dx}+\left({x}^{\mathrm{2}} {y}−{x}^{\mathrm{3}} \right){dy}=\mathrm{0}\:;\:\mu=\mu\left({x}\right) \\ $$
Commented by mr W last updated on 22/Apr/22
$$\mu\:{stands}\:{nowhere}\:{in}\:{the}\:{equation}. \\ $$