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The solution of $(x^2+y^2)dx =2xy \;dy$ is :

\[\begin {array} {1 1} (a)\;c(x^2-y^2)=x & \quad (b)\;c(x^2+y^2)=x \\ (c)\;c(x^2-y^2)=y & \quad (d)\;c(x^2+y^2)=y \end {array}\]

1 Answer

$(a)\;c(x^2-y^2)=x$
answered Feb 27, 2014 by meena.p
 
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