Keren Tangarorang
Dec 8, 2020

y(x^2-y^2+1)dx-x(x^2-y^2-1)dy=0

answer according to the book is x^2 +cxy+y^2=1 but i dont know how to get this answer.

1
Ian Fowler
Dec 16, 2020

As it stands right now it not exact since di M/ di y <> di N / di x

divide through by x^2y^2 and it will become exact.