1.

xy^(2)(dy)/(dx) + x(dy)/(dx)=1-x^(2)-x

Answer»

`X^(2)-y^(2)+LOG[x^(2)(y^(2)-1)]=c`
`x^(2)-y^(2)-log[x^(2)(y^(2)+1)]=c`
`y-tan^(-1)y=(logx)-(x^(2))/(2)+c`
`2x^(2)-y^(2)=log(x.tan^(-1)y)=c`

ANSWER :C


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