The given equation can be written as y dx=−2(y4−x)dy. It would be easier to solve this equation in terms of dydx.
dydx=−y(2y4−x)=−2y3+y2xdydx−y2x=−2y3
which is of the form
dydx+P(y)x=Q(y).
whose solution is given by xe∫Pdy=∫Qe∫Pdydy+c, where e∫Pdy is called the integrating factor.
Here P(y)=−y2 and e∫Pdy=e∫y−2=y21. Hence the solution of the given equation is
y2x=∫−2y3⋅y21dy+cy2x=∫−2ydy+cy2x=−y2+c∴x=cy2−y4
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